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Ken-Ichi Hikasa

Section

Tohoku University Advanced Graduate School

Job title

President-Appointed Extraordinary Professor

Degree

理学博士（東京大学）

researchmap

https://researchmap.jp/read0180334

J-GLOBAL ID

200901052666307052

Professional Memberships 1

日本物理学会

Research Interests 1

素粒子理論

Research Areas 1

Natural sciences / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics /

Awards 1

第14回素粒子メダル

2014/09/20　素粒子論グループ素粒子論委員会　素粒子標準模型の精密検証を可能にした理論計算の確立

Papers 79

Probing stops in the coannihilation region at the HL-LHC: A comparative study of different processes

Guang Hua Duan, Xiang Fan, Ken-ichi Hikasa, Bo Peng, Jin Min Yang

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics　810　2020/11/10
Publisher: Elsevier B.V.
DOI： 10.1016/j.physletb.2020.135800 　

ISSN： 0370-2693
Review of Particle Physics

P A Zyla, R M Barnett, J Beringer, O Dahl, D A Dwyer, D E Groom, C -J Lin, K S Lugovsky, E Pianori, D J Robinson, C G Wohl, W -M Yao, K Agashe, G Aielli, B C Allanach, C Amsler, M Antonelli, E C Aschenauer, D M Asner, H Baer, Sw Banerjee, L Baudis, C W Bauer, J J Beatty, V I Belousov, S Bethke, A Bettini, O Biebel, K M Black, E Blucher, O Buchmuller, V Burkert, M A Bychkov, R N Cahn, M Carena, A Ceccucci, A Cerri, D Chakraborty, R Sekhar Chivukula, G Cowan, G D'Ambrosio, T Damour, D de Florian, A de Gouvêa, T DeGrand, P de Jong, G Dissertori, B A Dobrescu, M D'Onofrio, M Doser, M Drees, H K Dreiner, P Eerola, U Egede, S Eidelman, J Ellis, J Erler, V V Ezhela, W Fetscher, B D Fields, B Foster, A Freitas, H Gallagher, L Garren, H -J Gerber, G Gerbier, T Gershon, Y Gershtein, T Gherghetta, A A Godizov, M C Gonzalez-Garcia, M Goodman, C Grab, A V Gritsan, C Grojean, M Grünewald, A Gurtu, T Gutsche, H E Haber, C Hanhart, S Hashimoto, Y Hayato, A Hebecker, S Heinemeyer, B Heltsley, J J Hernández-Rey, K Hikasa, J Hisano, A Höcker, J Holder, A Holtkamp, J Huston, T Hyodo, K F Johnson, M Kado, M Karliner, U F Katz, M Kenzie, V A Khoze, S R Klein, E Klempt, R V Kowalewski, F Krauss, M Kreps, B Krusche, Y Kwon, O Lahav, J Laiho, L P Lellouch, J Lesgourgues, A R Liddle, Z Ligeti, C Lippmann, T M Liss, L Littenberg, C Lourengo, S B Lugovsky, A Lusiani, Y Makida, F Maltoni, T Mannel, A V Manohar, W J Marciano, A Masoni, J Matthews, U -G Meißner, M Mikhasenko, D J Miller, D Milstead, R E Mitchell, K Mönig, P Molaro, F Moortgat, M Moskovic, K Nakamura, M Narain, P Nason, S Navas, M Neubert, P Nevski, Y Nir, K A Olive, C Patrignani, J A Peacock, S T Petcov, V A Petrov, A Pich, A Piepke, A Pomarol, S Profumo, A Quadt, K Rabbertz, J Rademacker, G Raffelt, H Ramani, M Ramsey-Musolf, B N Ratcliff, P Richardson, A Ringwald, S Roesler, S Rolli, A Romaniouk, L J Rosenberg, J L Rosner, G Rybka, M Ryskin, R A Ryutin, Y Sakai, G P Salam, S Sarkar, F Sauli, O Schneider, K Scholberg, A J Schwartz, J Schwiening, D Scott, V Sharma, S R Sharpe, T Shutt, M Silari, T Sjöstrand, P Skands, T Skwarnicki, G F Smoot, A Soffer, M S Sozzi, S Spanier, C Spiering, A Stahl, S L Stone, Y Sumino, T Sumiyoshi, M J Syphers, F Takahashi, M Tanabashi, J Tanaka, M Taševský, K Terashi, J Terning, U Thoma, R S Thorne, L Tiator, M Titov, N P Tkachenko, D R Tovey, K Trabelsi, P Urquijo, G Valencia, R Van de Water, N Varelas, G Venanzoni, L Verde, M G Vincter, P Vogel, W Vogelsang, A Vogt, V Vorobyev, S P Wakely, W Walkowiak, C W Walter, D Wands, M O Wascko, D H Weinberg, E J Weinberg, M White, L R Wiencke, S Willocq, C L Woody, R L Workman, M Yokoyama, R Yoshida, G Zanderighi, G P Zeller, O V Zenin, R -Y Zhu, S -L Zhu, F Zimmermann, J Anderson, T Basaglia, V S Lugovsky, P Schaffner, W Zheng

Progress of Theoretical and Experimental Physics　2020　(8)　2020/08/14
Publisher: Oxford University Press (OUP)
DOI： 10.1093/ptep/ptaa104 　

eISSN： 2050-3911

More details Close

<title>Abstract</title> The Review summarizes much of particle physics and cosmology. Using data from previous editions, plus 3,324 new measurements from 878 papers, we list, evaluate, and average measured properties of gauge bosons and the recently discovered Higgs boson, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as supersymmetric particles, heavy bosons, axions, dark photons, etc. Particle properties and search limits are listed in Summary Tables. We give numerous tables, figures, formulae, and reviews of topics such as Higgs Boson Physics, Supersymmetry, Grand Unified Theories, Neutrino Mixing, Dark Energy, Dark Matter, Cosmology, Particle Detectors, Colliders, Probability and Statistics. Among the 120 reviews are many that are new or heavily revised, including a new review on High Energy Soft QCD and Diffraction and one on the Determination of CKM Angles from B Hadrons. The Review is divided into two volumes. Volume 1 includes the Summary Tables and 98 review articles. Volume 2 consists of the Particle Listings and contains also 22 reviews that address specific aspects of the data presented in the Listings. The complete Review (both volumes) is published online on the website of the Particle Data Group (pdg.lbl.gov) and in a journal. Volume 1 is available in print as the PDG Book. A Particle Physics Booklet with the Summary Tables and essential tables, figures, and equations from selected review articles is available in print and as a web version optimized for use on phones as well as an Android app.
Testing electroweak SUSY for muon g − 2 and dark matter at the LHC and beyond

Murat Abdughani, Ken-ichi Hikasa, Lei Wu, Jin Min Yang, Jun Zhao

Journal of High Energy Physics　2019　(11)　2019/11/01
Publisher: Springer
DOI： 10.1007/JHEP11(2019)095 　

ISSN： 1029-8479 1126-6708
Probing bino-wino coannihilation dark matter below the neutrino floor at the LHC

Guang Hua Duan, Ken-Ichi Hikasa, Jie Ren, Lei Wu, Jin Min Yang

Physical Review D　98　(1)　2018/07/01
Publisher: American Physical Society
DOI： 10.1103/PhysRevD.98.015010 　

ISSN： 2470-0029 2470-0010
Status of CMSSM in light of current LHC Run-2 and LUX data Peer-reviewed

Chengcheng Han, Ken-ichi Hikasa, Lei Wu, Jin Min Yang, Yang Zhang

PHYSICS LETTERS B　769　470-476　2017/06

DOI： 10.1016/j.physletb.2017.04.026 　

ISSN： 0370-2693

eISSN： 1873-2445
Leptonic mono-top from single stop production at the LHC Peer-reviewed

Guang Hua Duan, Ken-ichi Hikasa, Lei Wu, Jin Min Yang, Mengchao Zhang

JOURNAL OF HIGH ENERGY PHYSICS　1703　(3)　091　2017/03

DOI： 10.1007/JHEP03(2017)091 　

ISSN： 1029-8479
REVIEW OF PARTICLE PHYSICS Particle Data Group Peer-reviewed

C. Patrignani, K. Agashe, G. Aielli, C. Amsler, M. Antonelli, D. M. Asner, H. Baer, Sw. Banerjee, R. M. Barnett, T. Basaglia, C. W. Bauer, J. J. Beatty, V. I. Belousov, J. Beringer, S. Bethke, H. Bichsel, O. Biebel, E. Blucher, G. Brooijmans, O. Buchmueller, V. Burkert, M. A. Bychkov, R. N. Cahn, M. Carena, A. Ceccucci, A. Cerri, D. Chakraborty, M. -C. Chen, R. S. Chivukula, K. Copic, G. Cowan, O. Dahl, G. D'Ambrosio, T. Damour, D. de Florian, A. de Gouvea, T. DeGrand, P. de Jong, G. Dissertori, B. A. Dobrescu, M. D'Onofrio, M. Doser, M. Drees, H. K. Dreiner, D. A. Dwyer, P. Eerola, S. Eidelman, J. Ellis, J. Erler, V. V. Ezhela, W. Fetscher, B. D. Fields, B. Foster, A. Freitas, H. Gallagher, L. Garren, H. -J. Gerber, G. Gerbier, T. Gershon, T. Gherghetta, A. A. Godizov, M. Goodman, C. Grab, A. V. Gritsan, C. Grojean, D. E. Groom, M. Gruenewald, A. Gurtu, T. Gutsche, H. E. Haber, K. Hagiwara, C. Hanhart, S. Hashimoto, Y. Hayato, K. G. Hayes, A. Hebecker, B. Heltsley, J. J. Hernandez-Rey, K. Hikasa, J. Hisano, A. Hoecker, J. Holder, A. Holtkamp, J. Huston, T. Hyodo, K. Irwin, J. D. Jackson, K. F. Johnson, M. Kado, M. Karliner, U. F. Katz, S. R. Klein, E. Klempt, R. V. Kowalewski, F. Krauss, M. Kreps, B. Krusche, Yu. V. Kuyanov, Y. Kwon, O. Lahav, J. Laiho, P. Langacker, A. Liddle, Z. Ligeti, C. -J. Lin, C. Lippmann, T. M. Liss, L. Littenberg, K. S. Lugovsky, S. B. Lugovsky, A. Lusiani, Y. Makida, F. Maltoni, T. Mannel, A. V. Manohar, W. J. Marciano, A. D. Martin, A. Masoni, J. Matthews, U. -G. Meissner, D. Milstead, R. E. Mitchell, P. Molaro, K. Monig, F. Moortgat, M. J. Mortonson, H. Murayama, K. Nakamura, M. Narain, P. Nason, S. Navas, M. Neubert, P. Nevski, Y. Nir, K. A. Olive, S. Pagan Griso, J. Parsons, J. A. Peacock, M. Pennington, S. T. Petcov, V. A. Petrov, A. Piepke, A. Pomarol, A. Quadt, S. Raby, J. Rademacker, G. Raffelt, B. N. Ratcliff, P. Richardson, A. Ringwald, S. Roesler, S. Rolli, A. Romaniouk, L. J. Rosenberg, J. L. Rosner, G. Rybka, R. A. Ryutin, C. T. Sachrajda, Y. Sakai, G. P. Salam, S. Sarkar, F. Sauli, O. Schneider, K. Scholberg, A. J. Schwartz, D. Scott, V. Sharma, S. R. Sharpe, T. Shutt, M. Silari, T. Sjostrand, P. Skands, T. Skwarnicki, J. G. Smith, G. F. Smoot, S. Spanier, H. Spieler, C. Spiering, A. Stahl, S. L. Stone, Y. Sumino, T. Sumiyoshi, M. J. Syphers, F. Takahashi, M. Tanabashi, K. Terashi, J. Terning, R. S. Thorne, L. Tiator, M. Titov, N. P. Tkachenko, N. A. Tornqvist, D. Tovey, G. Valencia, R. Van de Water, N. Varelas, G. Venanzoni, M. G. Vincter, P. Vogel, A. Vogt, S. P. Wakely, W. Walkowiak, C. W. Walter, D. Wands, D. R. Ward, M. O. Wascko, G. Weiglein, D. H. Weinberg, E. J. Weinberg, M. White, L. R. Wiencke, S. Wiliocq, C. C. Wohl, L. Wolfenstein, J. Womersley, C. L. Woody, R. L. Workman, W. -M. Yao, G. P. Zeller, O. V. Zenin, R. -Y. Zhu, F. Zimmermann, P. A. Zyla, J. Anderson, G. Harper, V. S. Lugovsky, P. Schaffner

CHINESE PHYSICS C　40　(10)　100001-1808　2016/10

DOI： 10.1088/1674-1137/40/10/100001 　

ISSN： 1674-1137
Single top squark production as a probe of natural supersymmetry at the LHC Peer-reviewed

Ken-ichi Hikasa, Jinmian Li, Lei Wu, Jin Min Yang

PHYSICAL REVIEW D　93　(3)　035003　2016/02

DOI： 10.1103/PhysRevD.93.035003 　

ISSN： 2470-0010

eISSN： 2470-0029
Review of Particle Physics Peer-reviewed

K.A. Olive, K. Agashe, C. Amsler

Chinese Physics C　39　(9)　1-1676　2014/09
Pseudo-goldstino and electroweak gauginos at the LHC Peer-reviewed

Ken-ichi Hikasa, Tao Liu, Lin Wang, Jin Min Yang

JOURNAL OF HIGH ENERGY PHYSICS　2014　(7)　065　2014/07

DOI： 10.1007/JHEP07(2014)065 　

ISSN： 1029-8479
Current experimental bounds on stop mass in natural SUSY Peer-reviewed

Chengcheng Han, Ken-ichi Hikasa, Lei Wu, Jin Min Yang, Yang Zhang

JOURNAL OF HIGH ENERGY PHYSICS　1310　(10)　216　2013/10

DOI： 10.1007/JHEP10(2013)216 　

ISSN： 1029-8479
REVIEW OF PARTICLE PHYSICS Particle Data Group Peer-reviewed

J. Beringer, J. -F. Arguin, R. M. Barnett, K. Copic, O. Dahl, D. E. Groom, C. -J. Lin, J. Lys, H. Murayama, C. G. Wohl, W. -M. Yao, P. A. Zyla, C. Amsler, M. Antonelli, D. M. Asner, H. Baer, H. R. Band, T. Basaglia, C. W. Bauer, J. J. Beatty, V. I. Belousov, E. Bergren, G. Bernardi, W. Bertl, S. Bethke, H. Bichsel, O. Biebel, E. Blucher, S. Blusk, G. Brooijmans, O. Buchmueller, R. N. Cahn, M. Carena, A. Ceccucci, D. Chakraborty, M. -C. Chen, R. S. Chivukula, G. Cowan, G. D'Ambrosio, T. Damour, D. de Florian, A. de Gouvea, T. DeGrand, P. de Jong, G. Dissertori, B. Dobrescu, M. Doser, M. Drees, D. A. Edwards, S. Eidelman, J. Erler, V. V. Ezhela, W. Fetscher, B. D. Fields, B. Foster, T. K. Gaisser, L. Garren, H. -J. Gerber, G. Gerbier, T. Gherghetta, S. Golwala, M. Goodman, C. Grab, A. V. Gritsan, J. -F. Grivaz, M. Grunewald, A. Gurtu, T. Gutsche, H. E. Haber, K. Hagiwara, C. Hagmann, C. Hanhart, S. Hashimoto, K. G. Hayes, M. Heffner, B. Heltsley, J. J. Hernandez-Rey, K. Hikasa, A. Hoecker, J. Holder, A. Holtkamp, J. Huston, J. D. Jackson, K. F. Johnson, T. Junk, D. Karlen, D. Kirkby, S. R. Klein, E. Klempt, R. V. Kowalewski, F. Krauss, M. Kreps, B. Krusche, Yu V. Kuyanov, Y. Kwon, O. Lahav, J. Laiho, P. Langacker, A. Liddle, Z. Ligeti, T. M. Liss, L. Littenberg, K. S. Lugovsky, S. B. Lugovsky, T. Mannel, A. V. Manohar, W. J. Marciano, A. D. Martin, A. Masoni, J. Matthews, D. Milstead, R. Miquel, K. Moenig, F. Moortgat, K. Nakamura, M. Narain, P. Nason, S. Navas, M. Neubert, P. Nevski, Y. Nir, K. A. Olive, L. Pape, J. Parsons, C. Patrignani, J. A. Peacock, S. T. Petcov, A. Piepke, A. Pomarol, G. Punzi, A. Quadt, S. Raby, G. Raffelt, B. N. Ratcliff, P. Richardson, S. Roesler, S. Rolli, A. Romaniouk, L. J. Rosenberg, J. L. Rosner, C. T. Sachrajda, Y. Sakai, G. P. Salam, S. Sarkar, F. Sauli, O. Schneider, K. Scholberg, D. Scott, W. G. Seligman, M. H. Shaevitz, S. R. Sharpe, M. Silari, T. Sjostrand, P. Skands, J. G. Smith, G. F. Smoot, S. Spanier, H. Spieler, A. Stahl, T. Stanev, S. L. Stone, T. Sumiyoshi, M. J. Syphers, F. Takahashi, M. Tanabashi, J. Terning, M. Titov, N. P. Tkachenko, N. A. Tornqvist, D. Tovey, G. Valencia, K. van Bibber, G. Venanzoni, M. G. Vincter, P. Vogel, A. Vogt, W. Walkowiak, C. W. Walter, D. R. Ward, T. Watari, G. Weiglein, E. J. Weinberg, L. R. Wiencke, L. Wolfenstein, J. Womersley, C. L. Woody, R. L. Workman, A. Yamamoto, G. P. Zeller, O. V. Zenin, J. Zhang, R. -Y. Zhu

PHYSICAL REVIEW D　86　(1)　010001　2012/07

DOI： 10.1103/PhysRevD.86.010001 　

ISSN： 1550-7998
Testing new physics models by top charge asymmetry and polarization at the LHC Peer-reviewed

Junjie Cao, Kenichi Hikasa, Lin Wang, Lei Wu, Jin Min Yang

PHYSICAL REVIEW D　85　(1)　014025　2012/01

DOI： 10.1103/PhysRevD.85.014025 　

ISSN： 2470-0010

eISSN： 2470-0029
Light dark matter in NMSSM and implication on Higgs phenomenology Peer-reviewed

Junjie Cao, Ken-ichi Hikasa, Wenyu Wang, Jin Min Yang

PHYSICS LETTERS B　703　(3)　292-297　2011/09

DOI： 10.1016/j.physletb.2011.07.086 　

ISSN： 0370-2693
Dark matter direct detection constraints on the minimal supersymmetric standard model and implications for LHC Higgs boson searches Peer-reviewed

Junjie Cao, Ken-ichi Hikasa, Wenyu Wang, Jin Min Yang, Li-Xin Yu

PHYSICAL REVIEW D　82　(5)　051701　2010/09

DOI： 10.1103/PhysRevD.82.051701 　

ISSN： 1550-7998
SUSY dark matter in light of CDMS II results: a comparative study for different models Peer-reviewed

Junjie Cao, Ken-ichi Hikasa, Wenyu Wang, Jin Min Yang, Li-Xin Yu

JOURNAL OF HIGH ENERGY PHYSICS　1007　(7)　075021　2010/07

DOI： 10.1007/JHEP07(2010)044 　

ISSN： 1029-8479
REVIEW OF PARTICLE PHYSICS Peer-reviewed

K. Nakamura, K. Hagiwara, K. Hikasa, H. Murayama, M. Tanabashi, T. Watari, C. Amsler, M. Antonelli, D. M. Asner, H. Baer, H. R. Band, R. M. Barnett, T. Basaglia, E. Bergren, J. Beringer, G. Bernardi, W. Bertl, H. Bichsel, O. Biebel, E. Blucher, S. Blusk, R. N. Cahn, M. Carena, A. Ceccucci, D. Chakraborty, M. -C. Chen, R. S. Chivukula, G. Cowan, O. Dahl, G. D'Ambrosio, T. Damour, D. de Florian, A. de Gouvea, T. DeGrand, G. Dissertori, B. Dobrescu, M. Doser, M. Drees, D. A. Edwards, S. Eidelman, J. Erler, V. V. Ezhela, W. Fetscher, B. D. Fields, B. Foster, T. K. Gaisser, L. Garren, H. -J. Gerber, G. Gerbier, T. Gherghetta, C. F. Giudice, S. Golwala, M. Goodman, C. Grab, A. V. Gritsan, J. -F. Grivaz, D. E. Groom, M. Grunewald, A. Gurtu, T. Gutsche, H. E. Haber, C. Hagmann, K. G. Hayes, M. Heffner, B. Heltsley, J. J. Hernandez-Rey, A. Hoecker, J. Holder, J. Huston, J. D. Jackson, K. F. Johnson, T. Junk, A. Karle, D. Karlen, B. Kayser, D. Kirkby, S. R. Klein, C. Kolda, R. V. Kowalewski, B. Krusche, Yu. V. Kuyanov, Y. Kwon, O. Lahav, P. Langacker, A. Liddle, Z. Ligeti, C. -J. Lin, T. M. Liss, L. Littenberg, K. S. Lugovsky, S. B. Lugovsky, J. Lys, H. Mahlke, T. Mannel, A. V. Manohar, W. J. Marciano, A. D. Martin, A. Masoni, D. Milstead, R. Miquel, K. Moenig, M. Narain, P. Nason, S. Navas, P. Nevski, Y. Nir, K. A. Olive, L. Pape, C. Patrignani, J. A. Peacock, S. T. Petcov, A. Piepke, G. Punzi, A. Quadt, S. Raby, G. Raffelt, B. N. Ratcliff, P. Richardson, S. Roesler, S. Rolli, A. Romaniouk, L. J. Rosenberg, J. L. Rosner, C. T. Sachrajda, Y. Sakai, G. P. Salam, S. Sarkar, F. Sauli, O. Schneider, K. Scholberg, D. Scott, W. G. Seligman, M. H. Shaevitz, M. Silari, T. Sjostrand, J. G. Smith, G. F. Smoot, S. Spanier, H. Spieler, A. Stahl, T. Stanev, S. L. Stone, T. Sumiyoshi, M. J. Syphers, J. Terning, M. Titov, N. P. Tkachenko, N. A. Tornqvist, D. Tovey, T. G. Trippe, G. Valencia, K. van Bibber, G. Venanzoni, M. G. Vincter, P. Vogel, A. Vogt, W. Walkowiak, C. W. Walter, D. R. Ward, B. R. Webber, G. Weiglein, E. J. Weinberg, J. D. Wells, A. Wheeler, L. R. . Wiencke, C. G. Wohl, L. Wolfenstein, J. Womersley, C. L. Woody, R. L. Workman, A. Yamamoto, W. -M. Yao, O. V. Zenin, J. Zhang, R. -Y. Zhu, P. A. Zyla, G. Harper, V. S. Lugovsky, P. Schaffner

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS　37　(7A)　1-5　2010/07

DOI： 10.1088/0954-3899/37/7A/075021 　

ISSN： 0954-3899

eISSN： 1361-6471
Review of particle physics Peer-reviewed

C. Amsler, M. Doser, M. Antonelli, D. M. Asner, K. S. Babu, H. Baer, H. R. Band, R. M. Barnett, E. Bergren, J. Beringer, G. Bernardi, W. Bertl, H. Bichsel, O. Biebel, P. Bloch, E. Blucher, S. Blusk, R. N. Cahn, M. Carena, C. Caso, A. Cecccci, D. Chakraborty, M. -C. Chen, R. S. Chivukula, G. Cowan, O. Dahl, G. D'Ambrosio, T. Damour, A. de Gouvea, T. DeGrand, B. Dobrescu, M. Drees, D. A. Edwards, S. Eidelman, V. D. Elvira, J. Erler, V. V. Ezhela, J. L. Feng, W. Fetscher, B. D. Fields, B. Foster, T. K. Gaisser, L. Garren, H. -J. Gerber, G. Gerbier, T. Gherghetta, G. F. Giudice, M. Goodman, C. Grab, A. V. Gritsan, J. -F. Grivaz, D. E. Groom, M. Gruenewald, A. Gurtu, T. Gutsche, H. E. Haber, K. Hagiwara, C. Hagmann, K. G. Hayes, J. J. Hernandez-Rey, K. Hikasa, I. Hincliliffe, A. Hoecker, J. Huston, P. Igo-Kemenes, J. D. Jackson, K. F. Johnson, T. Junk, D. Karlen, B. Kayser, D. Kirkby, S. R. Klein, I. G. Knowles, C. Kolda, R. V. Kowalewski, P. Kreitz, B. Krusche, Yu. V. Kuyanov, Y. Kwon, O. Lahav, P. Langacker, A. Liddle, Z. Ligeti, C. -J. Lin, T. M. Liss, L. Littenberg, J. C. Liu, K. S. Lugovsky, S. B. Lugovsky, H. Mahlke, M. L. Mangano, T. Mannel, A. V. Manohar, W. J. Marciano, A. D. Martin, A. Masoni, D. Milstead, R. Miquel, K. Moenig, H. Murayama, K. Nakamura, M. Narain, P. Nason, S. Navas, P. Nevski, Y. Nir, K. A. Olive, L. Pape, C. Patrignani, J. A. Peacock, A. Piepke, G. Punzi, A. Quadt, S. Raby, G. Raffelt, B. N. Rateliff, B. Renk, P. Richardson, S. Roesler, S. Rolli, A. Romaniouk, L. J. Rosenberg, J. L. Rosner, C. T. Sachrajda, Y. Sakai, S. Sarkar, F. Sauli, O. Schneider, D. Scott, W. G. Seligman, M. H. Shaevitz, T. Sjostrand, J. G. Smith, G. F. Smoot, S. Spanier, H. Spieler, A. Stahl, T. Stanev, S. L. Stone, T. Surniyoshi, M. Tanabashi, J. Terning, M. Titov, N. P. Tkachenko, N. A. Tornqvist, D. Tovey, G. H. Trilling, T. G. Trippe, G. Valencia, K. van Bibber, M. G. Vincter, P. Vogel, D. R. Ward, T. Watari, B. R. Vebber, G. Weiglein, J. D. Wells, M. Whalley, A. Wheeler, C. G. Wohl, L. Wolfenstein, J. Womersley, C. L. Woody, R. L. Workmnan, A. Yamamoto, W-M. Yao, O. V. Zenin, J. Zhang, R. -Y. Zhu, P. A. Zyla

PHYSICS LETTERS B　667　(1-5)　1-+　2008/09

DOI： 10.1016/j.physletb.2008.07.018 　

ISSN： 0370-2693

eISSN： 1873-2445
Supersymmetry-induced flavor-changing neutral-current top-quark processes at the CERN Large Hadron Collider Peer-reviewed

J. J. Cao, G. Eilam, M. Frank, K. Hikasa, G. L. Liu, I. Turan, J. M. Yang

PHYSICAL REVIEW D　75　(7)　075021　2007/04

DOI： 10.1103/PhysRevD.75.075021 　

ISSN： 2470-0010

eISSN： 2470-0029
Parity-odd asymmetries in W-jet events at the Fermilab Tevatron Peer-reviewed

Kaoru Hagiwara, Ken-ichi Hikasa, Hiroshi Yokoya

PHYSICAL REVIEW LETTERS　97　(22)　221802　2006/12

DOI： 10.1103/PhysRevLett.97.221802 　

ISSN： 0031-9007

eISSN： 1079-7114
Experimental constraints on supersymmetric top-charm partner flavor mixing and implications for top-quark flavor changing neutral current processes Peer-reviewed

Junjie Cao, Gad Eilam, Ken-ichi Hikasa, Jin Min Yang

PHYSICAL REVIEW D　74　(3)　031701　2006/08

DOI： 10.1103/PhysRevD.74.031701 　

ISSN： 2470-0010

eISSN： 2470-0029
Review of particle physics Peer-reviewed

W-M Yao, C. Amsler, D. Asner, R. M. Barnett, J. Beringer, P. R. Burchat, C. D. Carone, C. Caso, O. Dahl, G. D'Ambrosio, A. De Gouvea, M. Doser, S. Eidelman, J. L. Feng, T. Gherghetta, M. Goodman, C. Grab, D. E. Groom, A. Gurtu, K. Hagiwara, K. G. Hayes, J. J. Hernandez-Rey, K. Hikasa, H. Jawahery, C. Kolda, Y. Kwon, M. L. Mangano, A. V. Manohar, A. Masoni, R. Miquel, K. Moenig, H. Murayama, K. Nakamura, S. Navas, K. A. Olive, L. Pape, C. Patrignani, A. Piepke, G. Punzi, G. Raffelt, J. G. Smith, M. Tanabashi, J. Terning, N. A. Toernqvist, T. G. Trippe, P. Vogel, T. Watari, C. G. Wohl, R. L. Workman, P. A. Zyla, B. Armstrong, G. Harper, V. S. Lugovsky, P. S. Schaffner, M. Artuso, K. S. Babu, H. R. Band, E. Barberio, M. Battaglia, H. Bichel, O. Biebel, P. Bloch, E. Blucher, R. N. Cahn, D. Casper, A. Cattai, A. Ceccicco, D. Chakraborty, R. S. Chivukula, G. Cowan, T. Damour, T. De Grand, K. Desler, M. A. Dobbs, M. Drees, A. Edwards, D. A. Edwards, V. D. Elvira, J. Erler, W. Fetscher, B. D. Fields, B. Foster, D. Froidevaux, T. K. Gaisser, L. Garren, H. J. Gerber, G. Gerbier, L. Gibbons, F. J. Gilman, G. F. Giudice, A. V. Gritsan, M. Grunewald, H. E. Haber, C. Hagmann, I. Hinchliffe, A. Hocker, P. Igo-Kemenes, J. D. Jackson, K. F. Johnson, D. Karlen, B. Kayser, D. Kirkby, S. R. Klein, K. Kleinknecht, J. G. Knowles, R. V. Kowalewski, P. Kreitz, B. Krusche, Y. V. Kuyanov, O. Lahav, P. Langacker, A. Liddle, Z. Ligeti, T. M. Liss, L. Littenberg, J. C. Liu, K. S. Lugovsky, S. B. Lugovsky, T. Mannel, W. J. Marciano, A. D. Martin, D. Milstead, M. Narain, P. Nason, Y. Nir, J. A. Peacock, S. A. Prell, A. Quadt, S. Raby, B. N. Ratcliff, E. A. Razuvaev, B. Renk, P. R. Richardson, S. Roesler, G. Rolandi, M. T. Roman, L. J. Rosenberg, C. T. Sachrajda, Y. Salao, S. Sarkar, M. Schmitt, O. Schneider, D. Scott, T. Sjostrand, G. F. Smoot, P. Sokolsky, S. Spanier, H. Spieler, A. Stahl, T. Staney, R. E. Streitmatter, T. Sumiyoshi, N. P. Tkachenko, G. H. Trilling, G. Valencia, K. van Bibber, M. G. Vincter, D. R. Ward, B. R. Webber, J. D. Wells, M. Whalley, L. Wolfenstein, J. Womersley, C. L. Woody, A. Yamamoto, O. V. Zenin, J. Zhang, R. Y. Zhu

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS　33　(1)　1-+　2006/07

DOI： 10.1088/0954-3899/33/1/001 　

ISSN： 0954-3899

eISSN： 1361-6471
Flavor-changing neutral current top-squark decay as a probe of squark mixing Peer-reviewed

T Han, K Hikasa, JM Yang, XM Zhang

PHYSICAL REVIEW D　70　(5)　055001　2004/09

DOI： 10.1103/PhysRevD.70.055001 　

ISSN： 2470-0010

eISSN： 2470-0029
Review of particle physics Peer-reviewed

S Eidelman, KG Hayes, KA Olive, M Aguilar-Benitez, C Amsler, D Asner, KS Babu, RM Barnett, J Beringer, PR Burchat, CD Carone, C Caso, G Conforto, O Dahl, G D'Ambrosio, M Doser, JL Feng, T Gherghetta, L Gibbons, M Goodman, C Grab, DE Groom, A Gurtu, K Hagiwara, JJ Hernandez-Rey, K Hikasa, K Honscheid, H Jawahery, C Kolda, Y Kwon, ML Mangano, AV Manohar, J March-Russell, A Masoni, R Miquel, K Monig, H Murayama, K Nakamura, S Navas, L Pape, C Patrignani, A Piepke, G Raffelt, M Roos, M Tanabashi, J Terning, NA Tornqvist, TG Trippe, P Vogel, CG Wohl, RL Workman, WM Yao, PA Zyla, B Armstrong, PS Gee, G Harper, KS Lugovsky, SB Lugovsky, VS Lugovsky, A Rom, M Artuso, E Barberio, M Battaglia, H Bichsel, O Biebel, P Bloch, RN Cahn, D Casper, A Cattai, RS Chivukula, G Cowan, T Damour, K Desler, MA Dobbs, M Drees, A Edwards, DA Edwards, VD Elvira, J Erler, VV Ezhela, W Fetscher, BD Fields, B Fosler, D Froidevaux, M Fukugita, TK Gaisser, L Garren, HJ Gerber, G Gerbier, FJ Gilman, HE Haber, C Hagmann, J Hewett, Hinchliffe, I, CJ Hogan, G Hohler, P Igo-Kemenes, JD Jackson, KF Johnson, D Karlen, B Kayser, D Kirkby, Klein, SR, K Kleinknecht, IG Knowles, P Kreitz, YV Kuyanov, O Lahav, P Langacker, A Liddle, L Littenberg, DM Manley, AD Martin, M Narain, P Nason, Y Nir, JA Peacock, HR Quinn, S Raby, BN Ratcliff, EA Razuvaev, B Renk, G Rolandi, MT Ronan, LJ Rosenberg, CT Sachrajda, Y Sakai, AI Sanda, S Sarkar, M Schmitt, O Schneider, D Scott, WG Seligman, MH Shaevitz, T Sjostrand, GF Smoot, S Spanier, H Spieler, NJC Spooner, M Srednicki, A Stahl, T Stanev, M Suzuki, NP Tkachenko, GH Trilling, G Valencia, K van Bibber, MG Vincter, DR Ward, BR Webber, M Whalley, L Wolfenstein, J Womersley, CL Woody, OV Zenin, RY Zhu

PHYSICS LETTERS B　592　(1-4)　1-1109　2004/07

DOI： 10.1016/j.physletb.2004.06.001 　

ISSN： 0370-2693

eISSN： 1873-2445
Review of particle physics Peer-reviewed

K Hagiwara, K Hikasa, K Nakamura, M Tanabashi, M Aguilar-Benitez, C Amsler, RM Barnett, PR Burchat, CD Carone, C Caso, G Conforto, O Dahl, M Doser, S Eidelman, JL Feng, L Gibbons, M Goodman, C Grab, DE Groom, A Gurtu, KG Hayes, JJ Hernandez-Rey, K Honscheid, C Kolda, ML Mangano, DM Manley, AV Manohar, J March-Russell, A Masoni, R Miquel, K Monig, H Murayama, S Navas, KA Olive, L Pape, C Patrignani, A Piepke, M Roos, J Terning, NA Tornqvist, TG Trippe, P Vogel, CG Wohl, RL Workman, WM Yao, B Armstrong, PS Gee, KS Lugovsky, SB Lugovsky, VS Lugovsky, M Artuso, D Asner, KS Babu, E Barberio, M Battaglia, H Bichsel, O Biebel, P Bloch, RN Cahn, A Cattai, RS Chivukula, RD Cousins, G Cowan, T Damour, K Desler, RJ Donahue, DA Edwards, VD Elvira, J Erler, VV Ezhela, A Fasso, W Fetscher, BD Fields, B Foster, D Froidevaux, M Fukugita, TK Gaisser, L Garren, HJ Gerber, FJ Gilman, HE Haber, C Hagmann, J Hewett, Hinchliffe, I, CJ Hogan, G Hohler, P Igo-Kemenes, JD Jackson, KF Johnson, D Karlen, B Kayser, Klein, SR, K Kleinknecht, IG Knowles, P Kreitz, YV Kuyanov, R Landua, P Langacker, L Littenberg, AD Martin, T Nakada, M Narain, P Nason, JA Peacock, HR Quinn, S Raby, G Raffelt, EA Razuvaev, B Renk, L Rolandi, MT Ronan, LJ Rosenberg, CT Sachrajda, AI Sanda, S Sarkar, M Schmitt, O Schneider, D Scott, WG Seligman, MH Shaevitz, T Sjostrand, GF Smoot, S Spanier, H Spieler, NJC Spooner, M Srednicki, A Stahl, T Stanev, M Suzuki, NP Tkachenko, G Valencia, K van Bibber, MG Vincter, DP Ward, BR Webber, M Whalley, L Wolfenstein, J Womersley, CL Woody, OV Zenin

PHYSICAL REVIEW D　66　(1)　010001　2002/07

ISSN： 2470-0010

eISSN： 2470-0029
Review of Particle Properties

K. Hagiwara, K. Hikasa, K. Nakamura, M. Tanabashi, M. Aguilar-Benitez, C. Amsler, R. M. Barnett, P. R. Burchat, C. D. Carone, C. Caso, G. Conforto, O. Dahl, M. Doser, S. Eidelman, J. L. Feng, L. Gibbons, M. Goodman, C. Grab, D. E. Groom, A. Gurtu, K. G. Hayes, J. J. Herna`ndez-Rey, K. Honscheid, C. Kolda, M. L. Mangano, D. M. Manley, A. V. Manohar, J. March-Russell, A. Masoni, R. Miquel, K. Mönig, H. Murayama, S. Navas, K. A. Olive, L. Pape, C. Patrignani, A. Piepke, M. Roos, J. Terning, N. A. Törnqvist, T. G. Trippe, P. Vogel, C. G. Wohl, R. L. Workman, W. Yao, B. Armstrong, P. S. Gee, K. S. Lugovsky, S. B. Lugovsky, V. S. Lugovsky, M. Artuso, D. Asner, K. S. Babu, E. Barberio, M. Battaglia, H. Bichsel, O. Biebel, P. Bloch, R. N. Cahn, A. Cattai, R. S. Chivukula, R. D. Cousins, G. Cowan, T. Damour, K. Desler, R. J. Donahue, D. A. Edwards, V. D. Elvira, J. Erler, V. V. Ezhela, A. Fasso`, W. Fetscher, B. D. Fields, B. Foster, D. Froidevaux, M. Fukugita, T. K. Gaisser, L. Garren, H. Gerber, F. J. Gilman, H. E. Haber, C. Hagmann, J. Hewett, I. Hinchliffe, C. J. Hogan, G. Höhler, P. Igo-Kemenes, J. D. Jackson, K. F. Johnson, D. Karlen, B. Kayser, S. R. Klein, K. Kleinknecht, I. G. Knowles, P. Kreitz, Yu. V. Kuyanov, R. Landua, P. Langacker, L. Littenberg, A. D. Martin, T. Nakada, M. Narain, P. Nason, J. A. Peacock, H. R. Quinn, S. Raby, G. Raffelt, E. A. Razuvaev, B. Renk, L. Rolandi, M. T. Ronan, L. J. Rosenberg, C. T. Sachrajda, A. I. Sanda, S. Sarkar, M. Schmitt, O. Schneider, D. Scott, W. G. Seligman, M. H. Shaevitz, T. Sjöstrand, G. F. Smoot, S. Spanier, H. Spieler, N. J.C. Spooner, M. Srednicki, A. Stahl, T. Stanev, M. Suzuki, N. P. Tkachenko, G. Valencia, K. van Bibber, M. G. Vincter, D. R. Ward, B. R. Webber, M. Whalley, L. Wolfenstein, J. Womersley, C. L. Woody, O. V. Zenin

Physical Review D - Particles, Fields, Gravitation and Cosmology　66　(1)　2002

DOI： 10.1103/PhysRevD.66.010001 　

ISSN： 1550-2368 1550-7998
Evidence for σ in the ππ Scattering Amplitude Based on Crossing Symmetry and Chiral Low Energy Expansions(§2. ππ/Kπ Scattering,Possible Existence of the σ-Meson and Its Implications to Hadron Physics)

IGI Keiji, HIKASA Ken-ichi

Soryushiron Kenkyu Electronics　102　(5)　E79-E84　2001
Publisher: Soryushiron Kenkyu Editorial Office
DOI： 10.24532/soken.102.5_E79 　

ISSN： 0371-1838
Review of particle physics Peer-reviewed

D.E. Groom

European Physical Journal C　15　(1-4)　1-878　2000/03
R-parity violation and top quark polarization at the Fermilab Tevatron collider Peer-reviewed

K Hikasa, JM Yang, BL Young

PHYSICAL REVIEW D　60　(11)　114041　1999/12

ISSN： 0556-2821
Another look at pi pi scattering in the scalar channel Peer-reviewed

K Igi, K Hikasa

PHYSICAL REVIEW D　59　(3)　034005　1999/02

ISSN： 0556-2821
Probing anomalous top quark interactions at the Fermilab Tevatron collider Peer-reviewed

K Hikasa, K Whisnant, JM Yang, BL Young

PHYSICAL REVIEW D　58　(11)　114003　1998/12

ISSN： 0556-2821
Probing the sgeneration spectrum in chargino decays Peer-reviewed

K Hikasa, T Nagano

PHYSICS LETTERS B　435　(1-2)　67-72　1998/09

DOI： 10.1016/S0370-2693(98)00778-3 　

ISSN： 0370-2693
Review of Particle Physics Peer-reviewed

C Caso, G Conforto, A Gurtu, M Aguilar-Benitez, C Amsler, RM Barnett, PR Burchat, CD Carone, O Dahl, M Doser, S Eidelman, JL Feng, M Goodman, C Grab, DE Groom, K Hagiwara, KG Hayes, JJ Hernandez, K Hikasa, K Honscheid, F James, ML Mangano, AV Manohar, K Monig, H Murayama, K Nakamura, KA Olive, A Piepke, M Roos, RH Schindler, RE Shrock, M Tanabashi, NA Tornqvist, TG Trippe, P Vogel, CG Wohl, RL Workman, WM Yao, B Armstrong, JL Casas Serradilla, BB Filimonov, PS Gee, SB Lugovsky, S Mankov, F Nicholson, KS Babu, D Besson, O Biebel, RN Cahn, RL Crawford, RH Dalitz, T Damour, K Desler, RJ Donahue, DA Edwards, J Erler, VV Ezhela, A Fasso, W Fetscher, D Froidevaux, TK Gaisser, L Garren, S Geer, HJ Gerber, FJ Gilman, HE Haber, C Hagmann, Hinchliffe, I, CJ Hogan, G Hohler, JD Jackson, KF Johnson, D Karlen, B Kayser, K Kleinknecht, IG Knowles, C Kolda, P Kreitz, P Langacker, R Landua, L Littenberg, DM Manley, J March-Russell, T Nakada, H Quinn, G Raffelt, B Renk, MT Ronan, LJ Rosenberg, M Schmitt, DN Schramm, D Scott, T Sjostrand, GF Smoot, S Spanier, M Srednicki, T Stanev, T Suzuki, NP Tkachenko, G Valencia, K VanBibber, R Voss, L Wolfenstein, S Youssef

EUROPEAN PHYSICAL JOURNAL C　3　(1-4)　1-+　1998/07

ISSN： 1434-6044
SUSY23 V2.0: an event generator for supersymmetric processes at e(+)e(-) colliders Peer-reviewed

J Fujimoto, K Hikasa, T Ishikawa, M Jimbo, T Kaneko, K Kato, S Kawabata, T Kon, M Kuroda, Y Kurihara, T Munehisa, D Perret-Gallix, Y Shimizu, H Tanaka

COMPUTER PHYSICS COMMUNICATIONS　111　(1-3)　185-216　1998/06

ISSN： 0010-4655
Hard gluon emission from colored scalar pairs in e(+)e(-) annihilation Peer-reviewed

K Hikasa, J Hisano

PHYSICAL REVIEW D　54　(3)　1908-1918　1996/08

DOI： 10.1103/PhysRevD.54.1908 　

ISSN： 0556-2821
Particles and field .1. Review of particle physics Peer-reviewed

RM Barnett, CD Carone, DE Groom, TG Trippe, CG Wohl, B Armstrong, PS Gee, GS Wagman, F James, M Mangano, K Monig, L Montanet, JL Feng, H Murayama, JJ Hernandez, A Manohar, M AguilarBenitez, C Caso, RL Crawford, M Roos, NA Tornqvist, KG Hayes, K Hagiwara, K Nakamura, M Tanabashi, K Olive, K Honscheid, PR Burchat, RE Shrock, S Eidelman, RH Schindler, A Gurtu, K Hikasa, G Conforto, RL Workman, C Grab, C Amsler

PHYSICAL REVIEW D　54　(1)　1-+　1996/07

ISSN： 2470-0010

eISSN： 2470-0029
Soft-breaking correction to hard supersymmetric relations - QCD correction to squark decay Peer-reviewed

K Hikasa, Y Nakamura

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS　70　(1)　139-143　1996/03

DOI： 10.1007/s002880050091 　

ISSN： 0170-9739
Review of particle physics

R. M. Barnett, C. D. Carone, D. E. Groom, T. G. Trippe, C. G. Wohl, B. Armstrong, P. S. Gee, G. S. Wagman, F. James, M. Mangano, K. Mönig, L. Montanet, J. L. Feng, H. Murayama, J. J. Hernández, A. Manohar, M. Aguilar-Benitez, C. Caso, R. L. Crawford, M. Roos, N. A. Törnqvist, K. G. Hayes, K. Hagiwara, K. Nakamura, M. Tanabashi, K. Olive, K. Honscheid, P. R. Burchat, R. E. Shrock, S. Eidelman, R. H. Schindler, A. Gurtu, K. Hikasa, G. Conforto, R. L. Workman, C. Grab, C. Amsler

Physical Review D - Particles, Fields, Gravitation and Cosmology　54　(1)　1-708　1996

DOI： 10.1103/PhysRevD.54.1 　

ISSN： 1550-2368 1550-7998
4-FERMION DECAY OF HIGGS BOSONS Peer-reviewed

T ASAKA, K HIKASA

PHYSICS LETTERS B　345　(1)　36-41　1995/02

DOI： 10.1016/0370-2693(94)01599-8 　

ISSN： 0370-2693
REVIEW OF PARTICLE PROPERTIES Peer-reviewed

L MONTANET, RM BARNETT, DE GROOM, TG TRIPPE, CG WOHL, B ARMSTRONG, GS WAGMAN, H MURAYAMA, J STONE, JJ HERNANDEZ, FC PORTER, RJ MORRISON, A MANOHAR, M AGUILARBENITEZ, C CASO, P LANTERO, RL CRAWFORD, M ROOS, NA TORNQVIST, KG HAYES, G HOHLER, S KAWABATA, DM MANLEY, K OLIVE, RE SHROCK, S EIDELMAN, RH SCHINDLER, A GURTU, K HIKASA, G CONFORTO, RL WORKMAN, C GRAB

PHYSICAL REVIEW D　50　(3)　1173-+　1994/08

DOI： 10.1103/PhysRevD.50.1173 　

ISSN： 0556-2821
Review of particle properties Peer-reviewed

L. Montanet, K. Gieselmann, R. M. Barnett, D. E. Groom, T. G. Trippe, C. G. Wohl, B. Armstrong, G. S. Wagman, H. Murayama, J. Stone, J. J. Hernandez, F. C. Porter, R. J. Morrison, A. Manohar, M. Aguilar-Benitez, C. Caso, P. Lantero, R. L. Crawford, M. Roos, N. A. Törnqvist, K. G. Hayes, G. Höhler, S. Kawabata, D. M. Manley, K. Olive, R. E. Shrock, S. Eidelman, R. H. Schindler, A. Gurtu, K. Hikasa, G. Conforto, R. L. Workman, C. Grab

Physical Review D　50　(3)　1173-1814　1994

DOI： 10.1103/PhysRevD.50.1173 　

ISSN： 0556-2821
WW SCATTERING WITH SCALAR AND VECTOR RESONANCES Peer-reviewed

K HIKASA, K IGI

PHYSICAL REVIEW D　48　(7)　3055-3061　1993/10

DOI： 10.1103/PhysRevD.48.3055 　

ISSN： 0556-2821
A LIMIT ON MASSIVE NEUTRINO DARK MATTER FROM KAMIOKANDE Peer-reviewed

M MORI, K HIKASA, MM NOJIRI, Y OYAMA, A SUZUKI, K TAKAHASHI, M YAMADA, H TAKEI, K MIYANO, H MIYATA, KS HIRATA, K INOUE, T ISHIDA, T KAJITA, K KIHARA, M NAKAHATA, K NAKAMURA, A SAKAI, N SATO, Y SUZUKI, Y TOTSUKA, M KOSHIBA, K NISHIJIMA, T KAJIMURA, T SUDA, Y FUKUDA, E KODERA, Y NAGASHIMA, M TAKITA, H YOKOYAMA, K KANEYUKI, Y TAKEUCHI, T TANIMORI, EW BEIER, ED FRANK, W FRATI, SB KIM, AK MANN, FM NEWCOMER, R VANBERG, W ZHANG

PHYSICS LETTERS B　289　(3-4)　463-469　1992/09

ISSN： 0370-2693
STRONGLY INTERACTING WW SECTOR WITH A SCALAR RESONANCE Peer-reviewed

K HIKASA, KJ IGI

PHYSICS LETTERS B　261　(3)　285-288　1991/05

DOI： 10.1016/0370-2693(91)90329-O 　

ISSN： 0370-2693
SCALAR TOP PRODUCTION IN E+E- ANNIHILATION Peer-reviewed

M DREES, K HIKASA

PHYSICS LETTERS B　252　(1)　127-134　1990/12

DOI： 10.1016/0370-2693(90)91094-R 　

ISSN： 0370-2693
COMMENT ON THE DECAY Z0-]PI-0-GAMMA Peer-reviewed

K HIKASA

MODERN PHYSICS LETTERS A　5　(22)　1801-1808　1990/09

DOI： 10.1142/S0217732390002055 　

ISSN： 0217-7323
REVIEW OF PARTICLE PROPERTIES - PARTICLE-DATA-GROUP Peer-reviewed

JJ HERNANDEZ, J STONE, FC PORTER, RJ MORRISON, L MONTANET, K GIESELMANN, M AGUILARBENITEZ, G CONFORTO, C CASO, M ROOS, NA TORNQVIST, KG HAYES, KR SCHUBERT, G HOHLER, K HAGIWARA, K HIKASA, S KAWABATA, RM BARNETT, JJ EASTMAN, DE GROOM, GR LYNCH, A RITTENBERG, M SUZUKI, TG TRIPPE, CG WOHL, GP YOST, B ARMSTRONG, GS WAGMAN, KA OLIVE, RE SHROCK, RH SCHINDLER, RA EICHLER

PHYSICS LETTERS B　239　1-516　1990/04

ISSN： 0370-2693

eISSN： 1873-2445
NOTE ON QCD CORRECTIONS TO HADRONIC HIGGS DECAY Peer-reviewed

M DREES, K HIKASA

PHYSICS LETTERS B　240　(3-4)　455-464　1990/04

ISSN： 0370-2693
HEAVY-QUARK THRESHOLDS IN HIGGS-BOSON PHYSICS Peer-reviewed

M DREES, K HIKASA

PHYSICAL REVIEW D　41　(5)　1547-1561　1990/03

DOI： 10.1103/PhysRevD.41.1547 　

ISSN： 0556-2821
HIGGS-BOSON ASSOCIATED PRODUCTION IN E(+)E(-) ANNIHILATION BELOW THE Z Peer-reviewed

M DREES, K HIKASA

PHYSICAL REVIEW D　40　(1)　47-53　1989/07

DOI： 10.1103/PhysRevD.40.47 　

ISSN： 0556-2821
MUONS IN GAMMA-SHOWERS Peer-reviewed

M DREES, F HALZEN, K HIKASA

PHYSICAL REVIEW D　39　(5)　1310-1317　1989/03

DOI： 10.1103/PhysRevD.39.1310 　

ISSN： 0556-2821
TRANSVERSE-POLARIZATION EFFECTS AT EP COLLIDERS Peer-reviewed

K HIKASA

PHYSICAL REVIEW D　38　(5)　1439-1442　1988/09

DOI： 10.1103/PhysRevD.38.1439 　

ISSN： 0556-2821
PARTICLE PHYSICS IMPLICATIONS OF THE NEUTRINO BURST FROM THE LMC SUPERNOVA Peer-reviewed

K HIKASA, M KOBAYASHI, M YOSHIMURA

PROGRESS OF THEORETICAL PHYSICS　78　(2)　180-183　1987/08

DOI： 10.1143/PTP.78.180 　

ISSN： 0033-068X
LIGHT SCALAR TOP QUARK AT E+E- COLLIDERS Peer-reviewed

K HIKASA, M KOBAYASHI

PHYSICAL REVIEW D　36　(3)　724-732　1987/08

DOI： 10.1103/PhysRevD.36.724 　

ISSN： 0556-2821
SUPERHEAVY-QUARKONIUM PRODUCTION AND DECAYS - A NEW HIGGS-BOSON SIGNAL Peer-reviewed

BARGER, V, EWN GLOVER, K HIKASA, WY KEUNG, MG OLSSON, CJ SUCHYTA, XR TATA

PHYSICAL REVIEW D　35　(11)　3366-3395　1987/06

DOI： 10.1103/PhysRevD.35.3366 　

ISSN： 0556-2821
PROBING THE WEAK BOSON SECTOR IN E+E--]W+W- Peer-reviewed

K HAGIWARA, RD PECCEI, D ZEPPENFELD, K HIKASA

NUCLEAR PHYSICS B　282　(2)　253-307　1987/02

DOI： 10.1016/0550-3213(87)90685-7 　

ISSN： 0550-3213
PARTICLE PHYSICS WITH COSMIC ACCELERATORS Peer-reviewed

F HALZEN, K HIKASA, T STANEV

PHYSICAL REVIEW D　34　(7)　2061-2070　1986/10

DOI： 10.1103/PhysRevD.34.2061 　

ISSN： 0556-2821
HIGGS-BOSON-Z0 ASSOCIATED PRODUCTION FROM 4TH-GENERATION QUARKS AT SUPERCOLLIDER ENERGIES Peer-reviewed

BARGER, V, EWN GLOVER, K HIKASA, WY KEUNG, MG OLSSON, CJ SUCHYTA, XR TATA

PHYSICAL REVIEW LETTERS　57　(14)　1672-1675　1986/10

DOI： 10.1103/PhysRevLett.57.1672 　

ISSN： 0031-9007
PARITY AS A LOW-ENERGY SYMMETRY Peer-reviewed

K HIKASA

PHYSICA SCRIPTA　34　(3)　204-206　1986/09

DOI： 10.1088/0031-8949/34/3/004 　

ISSN： 0281-1847
RESOLUTION OF 2 CHARM PUZZLES - HADROPRODUCTION AND NEUTRINO-INDUCED SAME-SIGN DILEPTONS Peer-reviewed

CUDELL, JR, F HALZEN, K HIKASA

PHYSICS LETTERS B　175　(2)　227-232　1986/07

DOI： 10.1016/0370-2693(86)90722-7 　

ISSN： 0370-2693
TRANSVERSE-POLARIZATION EFFECTS IN E+E- COLLISIONS - THE ROLE OF CHIRAL SYMMETRY Peer-reviewed

K HIKASA

PHYSICAL REVIEW D　33　(11)　3203-3223　1986/06

DOI： 10.1103/PhysRevD.33.3203 　

ISSN： 0556-2821
COUNTING NEUTRINOS WITH MONOJETS Peer-reviewed

F HALZEN, K HIKASA

PHYSICS LETTERS B　168　(1-2)　135-140　1986/02

DOI： 10.1016/0370-2693(86)91475-9 　

ISSN： 0370-2693
STRUCTURE IN THE MOMENTUM DISTRIBUTION OF W,Z - A UNIFIED DESCRIPTION OF PPBAR COLLIDER ANOMALIES Peer-reviewed

F HALZEN, K HIKASA

PHYSICS LETTERS B　152　(5-6)　369-372　1985

DOI： 10.1016/0370-2693(85)90513-1 　

ISSN： 0370-2693
COMMENT ON SPINLESS-BOSON INTERPRETATIONS OF ANOMALOUS LLBAR-GAMMA-EVENTS Peer-reviewed

K HIKASA

PHYSICS LETTERS B　153　(1-2)　108-110　1985

DOI： 10.1016/0370-2693(85)91451-0 　

ISSN： 0370-2693
ANOMALOUS MISSING-PT EVENTS AT THE CERN PPBAR COLLIDER - THE STANDARD MODEL RE-EXAMINED Peer-reviewed

CUDELL, JR, F HALZEN, K HIKASA

PHYSICS LETTERS B　157　(5-6)　447-452　1985

DOI： 10.1016/0370-2693(85)90398-3 　

ISSN： 0370-2693
HEAVY HIGGS PRODUCTION IN E+E- AND E-E- COLLISIONS Peer-reviewed

K HIKASA

PHYSICS LETTERS B　164　(4-6)　385-390　1985

DOI： 10.1016/0370-2693(85)90346-6 　

ISSN： 0370-2693

eISSN： 1873-2445
PARITY-ODD ASYMMETRIES IN W-JET EVENTS AT HADRON COLLIDERS Peer-reviewed

K HAGIWARA, K HIKASA, N KAI

PHYSICAL REVIEW LETTERS　52　(13)　1076-1079　1984

DOI： 10.1103/PhysRevLett.52.1076 　

ISSN： 0031-9007
LIGHT SCALARS AND SU(5) PREDICTIONS FOR SIN2-THETA-W AND THE PROTON LIFETIME Peer-reviewed

K HAGIWARA, F HALZEN, K HIKASA

PHYSICS LETTERS B　141　(5-6)　372-376　1984

DOI： 10.1016/0370-2693(84)90265-X 　

ISSN： 0370-2693
EFFECTS OF TRANSVERSE POLARIZATION IN ELECTRON POSITRON COLLISIONS Peer-reviewed

K HIKASA

PHYSICS LETTERS B　143　(1-3)　266-268　1984

DOI： 10.1016/0370-2693(84)90847-5 　

ISSN： 0370-2693
LOOKING BEYOND THE STANDARD MODEL THROUGH PPBAR COLLIDERS Peer-reviewed

K HIKASA

PHYSICS LETTERS B　145　(1-2)　139-141　1984

DOI： 10.1016/0370-2693(84)90965-1 　

ISSN： 0370-2693
SEARCHING FOR T-FLAVOR-CHANGING NEUTRAL CURRENTS IN E+E- ANNIHILATION Peer-reviewed

K HIKASA

PHYSICS LETTERS B　149　(1-3)　221-224　1984

DOI： 10.1016/0370-2693(84)91589-2 　

ISSN： 0370-2693
COUNTING NEUTRINO SPECIES IN HIGH-ENERGY PROTON-ANTIPROTON COLLISIONS Peer-reviewed

K HIKASA

PHYSICAL REVIEW D　29　(9)　1939-1944　1984

DOI： 10.1103/PhysRevD.29.1939 　

ISSN： 0556-2821
TIME-REVERSAL ODD ASYMMETRY IN SEMI-INCLUSIVE LEPTOPRODUCTION IN QUANTUM CHROMODYNAMICS Peer-reviewed

K HAGIWARA, KI HIKASA, N KAI

PHYSICAL REVIEW D　27　(1)　84-97　1983

DOI： 10.1103/PhysRevD.27.84 　

ISSN： 0556-2821
QUARK-ANTIQUARK POTENTIAL AND Q2 DUALITY Peer-reviewed

K IGI, K HIKASA

PHYSICAL REVIEW D　28　(3)　565-571　1983

DOI： 10.1103/PhysRevD.28.565 　

ISSN： 2470-0010

eISSN： 2470-0029
A TEST OF GAUGE NATURE OF THE W BOSON IN THE REACTION E+E- -]Z-GAMMA Peer-reviewed

K HIKASA

PHYSICS LETTERS B　128　(3-4)　253-256　1983

DOI： 10.1016/0370-2693(83)90403-3 　

ISSN： 0370-2693
SUPPRESSION OF MONOPOLES IN GRAND UNIFIED THEORIES Peer-reviewed

K HIKASA

PROGRESS OF THEORETICAL PHYSICS　67　(4)　1258-1261　1982

DOI： 10.1143/PTP.67.1258 　

ISSN： 0033-068X
NARROW HIGH-SPIN B-FLAVORED MESONS Peer-reviewed

K HIKASA, K IGI

PHYSICAL REVIEW D　23　(9)　2027-2033　1981

DOI： 10.1103/PhysRevD.23.2027 　

ISSN： 0556-2821
MEASURING 3-GLUON COUPLING IN SEMI-INCLUSIVE NEUTRINO AND ANTINEUTRINO SCATTERING Peer-reviewed

K HAGIWARA, K HIKASA, N KAI

PHYSICAL REVIEW LETTERS　47　(14)　983-989　1981

DOI： 10.1103/PhysRevLett.47.983 　

ISSN： 0031-9007
AN UPPER BOUND FOR THE T-QUARK MASS FROM DUALITY AND UNITARITY Peer-reviewed

K HIKASA, K IGI

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS　6　(1)　47-49　1980

DOI： 10.1007/BF01427920 　

ISSN： 0170-9739

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Misc. 16

ヒッグス後の素粒子物理：質量の起源をめぐって

日笠健一

パリティ　32　(1)　37-39　2017/01
Publisher: 丸善出版
ISSN： 0911-4815
素粒子物理と場の量子論：標準模型からその先へ

日笠健一

数理科学　54　(3)　34-40　2016/03
Publisher: サイエンス社
ISSN： 0386-2240
コラム：メイドインジャパン物理用語素粒子・原子核編湯川結合

日笠健一

パリティ　28　(3)　35-35　2013/03/01
Publisher: 丸善
新種の素粒子ヒッグス：素粒子の世界におけるその役割

日笠健一

パリティ　27　(12)　6-10　2012/12
Publisher: 丸善
ISSN： 0911-4815
Weak interaction: behind the ...

Ken-ichi Hikasa

Suuri Kagaku　48　(8)　21-26　2010/08
Publisher: Science Sha
LHC opens a new frontier of elementary particles

Ken-ichi Hikasa

Kagaku　79　(5)　496-501　2009/05/01
Publisher: Iwanami Shoten
ISSN： 0022-7625
Nobel prize in physics 2008

Ken-ichi Hikasa

Physics education in Tohoku　18　2-6　2009/03/28
Publisher: Tohoku branch of Physics Education Society in Japan
Development in Particle Physics and the Role of LHC

Ken-ichi Hikasa

日本物理学会誌　62　(12)　916-922　2007/12/05
Publisher: 日本物理学会
ISSN： 0029-0181

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Our understanding of the fundamental forces in Nature has developed to such a stage that all but one (gravity) of the known interactions can be understood as those mediated by spin-one gauge bosons. On the other hand, generation of the mass of elementary particles requires the existence of yet unknown interactions, the simplest possibility being the Higgs sector of the Standard Model. One of the most important physics aims of LHC is to test if this idea is correct. Other new phenomena are expected to lie in the LHC energy region. Supersymmetry is one of the most attractive candidates among various theoretical ideas of new physics at the LHC.
名著に親しむ：超対称性をめぐって

Ken-ichi Hikasa

数理科学　45　(3)　36-37　2007/03
Publisher: サイエンス社
Particle Data Book

Ken-ichi Hikasa, Kenzo Nakamura

High Energy News　24　(2)　98-102　2005/09
Publisher: Japan Association of High Energy Physics
Review of Particle Physics: Particle data group

K. Hagiwara, K. Hikasa, K. Nakamura, M. Tanabashi, M. Aguilar-Benitez, C. Amsler, R. M. Barnett, P. R. Burchat, C. D. Carone, C. Caso, G. Conforto, O. Dahl, M. Doser, S. Eidelman, J. L. Feng, L. Gibbons, M. Goodman, C. Grab, D. E. Groom, A. Gurtu, K. G. Hayes, J. J. Hernández-Rey, K. Honscheid, C. Kolda, M. L. Mangano, D. M. Manley, A. V. Manohar, J. March-Russell, A. Masoni, R. Miquel, K. Mönig, H. Murayama, S. Navas, K. A. Olive, L. Pape, C. Patrignani, A. Piepke, M. Roos, J. Terning, N. A. Törnqvist, T. G. Trippe, P. Vogel, C. G. Wohl, R. L. Workman, W. M. Yao, B. Armstrong, P. S. Gee, K. S. Lugovsky, S. B. Lugovsky, V. S. Lugovsky, M. Artuso, D. Asner, K. S. Babu, E. Barberio, M. Battaglia, H. Bichsel, O. Biebel, P. Bloch, R. N. Cahn, A. Cattai, R. S. Chivukula, R. D. Cousins, G. Cowan, T. Damour, K. Desler, R. J. Donahue, D. A. Edwards, V. D. Elvira, J. Erler, V. V. Ezhela, A. Fassó, W. Fetscher, B. D. Fields, B. Foster, D. Froidevaux, M. Fukugita, T. K. Gaisser, L. Garren, H. J. Gerber, F. J. Gilman, H. E. Haber, C. Hagmann, J. Hewett, I. Hinchliffe, C. J. Hogan, G. Höhler, P. Igo-Kemenes, J. D. Jackson, K. F. Johnson, D. Karlen, B. Kayser, S. R. Klein, K. Kleinknecht, I. G. Knowles, P. Kreitz, Yu. V. Kuyanov, R. Landua, P. Langacker, L. Littenberg, A. D. Martin, T. Nakada, M. Narain, P. Nason, J. A. Peacock, H. R. Quinn, S. Raby, G. Raffelt, E. A. Razuvaev, B. Renk, L. Rolandi, M. T. Ronan, L. J. Rosenberg, C. T. Sachrajda, A. I. Sanda, S. Sarkar, M. Schmitt, O. Schneider, D. Scott, W. G. Seligman, M. H. Shaevitz, T. Sjöstrand, G. F. Smoot, S. Spanier, H. Spieler, N. J.C. Spooner, M. Srednicki, A. Stahl, T. Stanev, M. Suzuki, N. P. Tkachenko, G. Valencia, K. van Bibber, M. G. Vincter, D. R. Ward, B. R. Webber, M. Whalley, L. Wolfenstein, J. Womersley, C. L. Woody, O. V. Zenin

Physical Review D - Particles, Fields, Gravitation and Cosmology　66　(1 I)　100011-10001958　2002/07/01

ISSN： 0556-2821
標準理論を超えて

日笠健一

パリティ　17　(1)　29-30　2002/01
Publisher: 丸善
新著紹介： D. Green, Lectures in Particle Physics

日笠健一

Butsuri　50　(9)　743-743　1995/09/05
Publisher: 日本物理学会
素粒子の標準模型とは何か

日笠健一

科学　63　(7)　419-424　1993/07/01
Publisher: 岩波書店
ISSN： 0022-7625
素粒子の大統一理論

日笠健一

Newton　11　(13)　12-13　1991/12/07
Publisher: Kyoikusha
宇宙からの超対称粒子

日笠健一

Parity　3　(5)　46-48　1988/05/01
Publisher: 丸善

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Books and Other Publications 10

ディラック方程式：相対論的量子力学と量子場理論（SGCライブラリ105）

日笠健一

サイエンス社　2014/03/25
Handbook of Particle Physics

山田作衛, 相原博昭, 岡田安弘, 坂井典佑, 西川公一郎

Asakura Shoten　2010/10

ISBN: 9784254131000
Encyclopedia of Applied High Energy and Particle Physics

Reinhard Stock

Wiley-VCH　2009/10
Quantum Mechanics

Ken-ichi Hikasa

Asakura Shoten　2008/11/10
Encyclopedia of Physics

日笠健一

Asakura Shoten　2005/10/25
Encyclopedia of Physics, Third Edition

R. W. Hayward, K. Hikasa

WILEY-VCH　2005/10
失われた反世界素粒子物理学で探る

三田一郎

クバプロ　2002/10/30
McGraw-Hill Encyclopedia of Physics, Second Edition

物理学大辞典編集委

Maruzen　1999/03/31
Encyclopedia of Applied Physics, Vol. 23

K. Hikasa

Wiley-VCH Verlag　1998
物理学事典改訂版

物理学事典編集委

培風館　1992/05/20

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Research Projects 21

Helicity amplitudes for general spin and physics beyond the standard model at LHC

HIKASA Ken-ichi, TAKAHASHI Fuminobu

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2012/04/01 - 2015/03/31

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Helicity amplitudes are useful for processes in high energy physics, especially when parity-violating interactions are involved. We have developed a formalism to evaluate helicity amplitudes of processes including particles with spin higher than one in terms of Wigner's d functions. We examine new physics processes at the LHC collider in models including several scenarios in the supersymmetric standard model. Limits on the scalar top quark mass is derived using ATLAS data from LHC in the natural SUSY scenario. We also study models with pseudo-goldstinos and find that future high-luminosity LHC will be able to detect production of neutralinos/charginos decaying to pseudo-goldstinos emitting W, Z, or Higgs bosons.
New Developments of Flavor Physics (Coordinating Group)

YAMANAKA Taku, OSHIMA Takayoshi, KIM Shinhong, NISHIKAWA Koichiro, NIWA Kimio, NAKAMURA Mitsuhiro, HIKASA Kenichi, NAKAYA Tsuyoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Priority Areas

Institution: Osaka University

2006 - 2012

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Grant-in-Aid for Scientific Research on Priority Areas: “New Devel-opments of Flavor Physics” was executed to study the quark and lepton .avor mixings from both the experimental and theoretical sides. The experiments used the world’s best accelerator facilities and detector techniques to make high sensitivity and high precision measurements. Coordinating Group was formed to enhance communication between ex-perimental and theoretical groups, to advance the flavor physics field, and to feed back the newest knowledge to the general public.
Theoretical studies on physics beyond the Standard Model wit flavor mixing

HIKASA Ken-ichi, YAMAGUCHI Masahiro, KITANO Ryuichiro, YAMADA Youichi, TANABASHI Masaharu, TOBE Kazuhiro, MOROI Takeo, OKUMURA Ken-ichi, KOHRI Kazunori, NOMURA Daisuke, YANG Jin Min

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Priority Areas

Institution: Tohoku University

2006 - 2011

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Phenomena of flavor mixing of quarks and leptons provide important clue on the physics beyond the Standard Model. This project contains various theoretical studies on candidates of the physics beyond the Standard Model such as supersymmetry and extra dimensions, as well as related cosmology. We have obtained many new insights on each of these and contributed to the development of the field. Suggestions to present and future flavor physics experiments are given.
Phenomenological and cosmological studies towards building new paradigm of particle hysics

YAMAGUCHI Masahiro, HIKASA Kenichi, ISHIKAWA Hiroshi, YOKOYAMA Junichi, TANABASHI Masaharu, MOROI Takeo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2005 - 2008
Dynamics of electroweak symmetry breaking and its application to cosmology

YOSHIMURA Motohiko, HISANO Junji, TANABASHI Masaharu, MOROI Takeo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Priority Areas

2001 - 2006

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The head member of this project, M. Yoshimura, has launched a new investigation of how to determine the nature (Majorana vs Dirac) and the absolute magnitude and all mixing angles of neutrino mass matrix by means of new experimental technique. This method uses unstable atomic states and detects a neutrino pair emission, when they are irradiated by a high-quality laser with some tuning condition. The ultimate goal is to verify and elucidate the idea of the grand design of leptogenesis, which is based on the Majorana nature of neutrino and the seesaw mechanism of mass generation. Moroi has discussed effects of gravitino on big-bang nucleosynthesis. The result shows important constraint on the reheat temperature after inflation, and imposes a new challenge both to leptogenesis and baryogenesis. Hisano studied, and greatly refined computation of, dark matter detection in cases of the neutralino dark matter. Tanabashi studied the structure of the electroweak symmetry breaking in TeV scale extra dimension models.
Study of Mass Origin and Supersymmetry Physics

KIM Shinhong, AIHARA Hiroaki, OHSHIMA Takayoshi, HIKASA Kenichi, SUGIMOTO Shojiro, YAMANAKA Taku

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research on Priority Areas

Institution: University of Tsukuba

2001 - 2006
ヒッグスセクターと超対称理論ダイナミックスの現象論的研究

日笠健一, 山口昌弘, 棚橋誠治, 諸井健夫, 山田洋一, 野尻美保子

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特定領域研究

Institution: 東北大学

2002 - 2005

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超対称模型については,リニアコライダーにおいて,超対称標準理論の重いヒッグス粒子生成過程を調べた。真空期待値の比が大きい場合,ヒッグス粒子の質量や崩壊幅,分岐比がどの程度の精度で決定できるのかを調べ,コライダー実験結果により暗黒物質密度をよい精度で計算できることを示した。また,グルイノの質量の極値をラグランジアンの有効パラメータの関数として,超対称QCDの2ループの補正までの計算を行った。2次の補正の大きさは1-2%となることが見出された。超対称理論に基づく宇宙論として,(1)多くの模型には最も軽い超対称粒子として安定なニュートラリーノが存在し,宇宙の暗黒物質の候補として有力であるが,その密度が大きくなりすぎる傾向がある。その生成過程として,通常の熱的過程とは異なりグラヴィティーノの崩壊によって作られる過程を提案し,これが可能なパラメータ領域を同定した。(2)超対称理論において,ニュートリノの質量がディラック型で,非常に小さな湯川結合を持つケースは,あまり考えられていない。この場合に右巻きスカラーニュートリノが宇宙暗黒物質を形成することが可能かどうかを検討し,超対称粒子のスペクトルを調べた。余剰次元模型に関しては,ランドール・サンドラム背景をもつワープした標準模型を調べ,普遍的に近い湯川結合を持つモデルについて,標準模型フェルミオンの質量を決定するための簡単な解析的方法を提案した。また,ニュートリノのMNS混合行列のe3成分が実験の上限に近い値を持つことを予測した。一方,ヒッグスレス模型で理想的な非局所化のされた模型では,電弱精密測定による制限を逃れることができるが,この場合には,3点以上のゲージボソン相互作用に効果が現れる。この大きさを評価し,現在の実験からはカルザ・クライン励起の質量に対し数百GeVというゆるい制限しか得られないことを見出した。
最高エネルギー衝突反応の理論的研究

萩原薫, 神崎純一, 久野純治, 岡田安弘, 松井隆幸, 栗原良将, 旨笠健一, 野尻美保子, 小平治郎, 野崎光昭, 渡部勇, 浅井祥仁, 川越清以

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特定領域研究

Institution: 高エネルギー加速器研究機構

1999 - 2003

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本年度はLEP実験データの最終解析年度となり、本理論研究グループの研究の主題も、将来のコライダー実験で、新しい物理を検出する可能性の検討、そしてその検出法の考察に向けられた。シミュレーションツールの開発に関しては、将来のリニアコライダーでのヒッグス物理の精密実験に備え、電子陽電子消滅過程での二重ヒッグス生成に対する量子電気力学による輻射補正の計算を完成した(栗原)。また、ハドロンコライダーでの多重ジェット生成の解析に強みを持つ自動イベント生成プログラム、MadEventの製作管理者、ローマ大学のF.Maltoni氏をKEKに招聘し、講演と議論をしていただいた。将来のリニアコライダーGLCの物理に関しては、光子光子衝突モードで、光子ビームの偏極と、トップクォーク対の崩壊角度相関を調べることにより、中間状態に寄与するヒッグスボソンのCPパリティー、生成振幅の位相等が計測可能であることを示した(萩原)。ニュートリノ質量のシーソー機構を持つ超対称性模型において、ヒッグスボソンの媒介効果により、ミューオン・電子遷移等のレプトン数非保存過程が促される可能性を指摘した(岡田)。宇宙のダークマターが最小質量の超対称性粒子である場合、その粒子が電弱理論の荷電を持ち、質量が充分重い場合には、ダークマター対の2光子への崩壊が他の崩壊モードと拮抗する可能性があることを示した。高エネルギー宇宙線光子の観測がダークマター検出に結び付く可能性を指摘したもので、重要な発見である(野尻、久野)。数年後に開始される陽子陽子コライダーLHCでの超対称性粒子検出実験において、もし同時期に電子陽電子リニアコライダー実験が可能であれば、理論のパラメータの決定が飛躍的に改良することを示した(野尻)。また、グルイノが主に第三世代のスクォークに崩壊する場合の、LHCでの超対称性粒子生成シグナルを検討した(野尻、久野)。
Super-high Luminosity B Factory an A Its Physics

YAMAUCHI Masanori, OIDE Katsunobu, OKADA Yasuhiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: High Energy Accelerator Research Organization (KEK)

2000 - 2002

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As a consequence of this research program, it became clearer that new physics such as supersymmetry could be investigated by increasing the luminosity of the B factory. Simulation studies were performed to investigate the experimental sensitivities to various theoretical predictions, and we found that the search for charged Higgs particle in B→Dτv decays with 5000fb^<-1> is equivalent to the direct search in LHC experiment with 100fb^<-1>. Also, the FCNC decays of B meson, B→K^*μμ, is found to be sensitive to the contribution of SUSY particles, if the forward-backward asymmetry is measured with 3000fb^<-1>. The research of the accelerator enabled us to identify the fundamental issues that have to be solved to design the storage ring to accumulate much higher beam current. Based on this result and the experience at the KEKB accelerator, it is concluded that a collider with the luminosity higher than 10^<35>. Also the research of the detector enabled us to identify the necessary R&D items to carry out an experiment at the higher luminosity beyond 10^<35>.
Top quark physics at colliders

HIKASA Ken-ichi, SUMINO Yukinari, YAMADA Youichi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2000 - 2001

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1. Precise determination of the top quark mass may be made by measuring the cross section of the process e^+e^- → tt^^- near threshold. We find that theoretical error in the determination can be made small by using the <MS>^^^- mass instead of the pole mass as the parameter representing the top quark mass. 2. We examine the bottomonium spectrum using higher order perturbative QCD calculation and find that the theory reproduces the data quite well, in contrary to the belief that perturbation theory is not applicable. 3. We study the decay of the top squark in the mass region where the direct decay to the top quark is not kinematically allowed. We calculated the decay to a charm squark a neutralino via flavor-changing neutral current in the supergravity model by solving renormalization group equations. We show that this mode can be dominant when the parameter tan β is large. We further examine the case this mode competes with the charged current decay to a bottom squark and a chargino and propose a method to detect the top squark pair production events at hadron colliders 4. Definition of the mixing matrix is nontrivial at higher orders in perturbation theory. We examine the gauge dependence of the mixing matrix and explicitly calculated the correction in several examples. 5. It is known that the QCD correction for the decay of a Higgs boson to quarks and squarks is rather large. We find that a clever choice of the lowest-order parameter can reduce the size of the correction, leading to more reliable theoretical predictions.
Testing Supersymmetry at Energy-Frontier Colliders

HIKASA Ken-ichi, YAMADA Youichi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: TOHOKU UNIVERSITY

1998 - 1999

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1. We study three-body decays of charginos in supersymmetry and examine the dependence of the decay rates on the mass of scalar quarks and leptons. We find that a heavy sfermion can influence the rate drastically if the chargino is gaugino-like, even if the two-body decay channel to W is open. Study of the final state leptons and jets will be useful to extract the sfermion mass from the data. 2. Supersymmetric relation between coupling constants receive corrections from soft-breaking sfermion masses and may be useful to obation information on very heavy sfermions. We study its effect in chargino pair production in eィイD1+ィエD1eィイD1-ィエD1 annihilation. 3. We find that the decay of third-generation sfermions to final states containing a gauge or Higgs boson can have a substantial branching fration. 4. Lepton number breaking top quark interaction can appear in R-parity breaking supersymmetric models. We calculate its effect in top pair production at the Tevatron and find that top polarization and forward-backward asymmetry are useful observables to improve the limit on the coupling. 5. We study the distribution of lepton pairs in the decay of the second lightest neutralino at the LHC, as a means to determine the mass difference. We find that the distribution is very sensitive to the model parameters.
Testing Physics Beyond the Standard Model at Linear Colliders

HIKASA Ken-ichi, SUMINO Yukinari

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

1996 - 1997

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1.We study three-body decays of charginos in supersymmetry and examine the dependence of the branching ratios on the mass of scalar quarks and leptons. We find that the ratio of electronic and tauonic branching ratio can have a large deviation from one if the chargino is gaugino-like. This measurement should be useful to obtain information on slepton masses and therefore a key to the mechanism of supersymmetry breaking. 2.In the gauge mediated scenario of supersymmetry breaking, superparticles eventually decay to a gravitino, which has a spin 3/2. We develop a formalism to calculate helicity amplitudes for processes containing spin 3/2 particles. Some decay processes with a gravitino in the initial or final state are calculated. 3.We develop a compute code which generates programs to calculate cross sections for superparticle production processes (with two or three body final states) in e^+e^- collisions. 4.We study the effect of final state interaction due to gluon exchange on the energy and angular distributions of final leptons in top production in e^+e^- collisions. The distributions change by ten percent due to this effect. We also calculate the second order correction to the QCD potential which is related to the top production process. We find that the result changes according to whether the renormalization group equation is solved in the momentum or the configuration space. This ambiguity gives a 6% error to the cross section. 5.We apply the N/D method developed for the strongly interacting Higgs sector to pipi scattering and find a result suggestive of the existence of the sigma meson.
The origin of elementary particle interaction

SANDA Ichiro, MOROZUMI Takuya, KURIMOTO Takeshi, SAKAI Norisuke, KITAZAWA Noriaki, HIKASA Kennichi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: NAGOYA UNIVERSITY

1994 - 1996

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1) The origin of CP violation While observed CP violation in K decay is only 0.2%, the KM model predicts nearly 100% CP violating effects in B decays. To understand the origin of CP violation it is crucial to discover this large CP violation. To achieve this goal, large number of B mesons must be created and the decay modes must be studied. At present B factory is being constructed at KEK and at SLAC.Both laboratories are competing against each other with the top level technology and physics. As a member of the Japanese high energy community we hope to see KEK discover CP violation first. To achieve this goal, we have initiated a study group to support this activity at KEK. The origin of quark masses A) Within the framework of SUSY GUT,Georgi-Jarlskog mass matrix was studied. The result of this study was that G-J matrix does not adequately explain the values of the KM matrix and the quark mass spectrum. How to get phases in to the mass matrix at the GUT scale is an important topic of the future study. B) The NNI form General quark matrices have 36 parameters. It has been shown that when they are transformed to the NNI form, a general mass matrices can be written in terms of 12 parameters. Out of these, 6 can be fixed with 6 quark masses. We have succeeded in fixing 4 other parameters using the KM matrix.
PARTICLE PHYSICS AT LINEAR COLLIDERS

HIKASA Ken-ichi, SUMINO Yukinari

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for General Scientific Research (C)

Institution: TOHOKU UNIVERSITY

1994 - 1995

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1.We calculate =(alpha_s) QCD correction to pair production of colored scalar particles (like squarks) in e^+e^- annihilation and compared it with fermion pair production. We find that both total and three-jet rate have significant dependence on the spin of the particle. 2.We study the final state interaction in the reaction e^+e^-*W^+W^- in the presence of strong symmetry-breaking interactions. Two formulations of chiral Lagrangian and a model with a vector resonance are used. We find that the effect of a vector resonance mass up to 2,000-2,500 GeV may be detected at a linear collider of 500 GeV center-or-mass energy. 3.If the top quark mass is generated by an unknown strong interaction, we find that the effect of the interaction is visible in top pair production by photon-photon collisions at linear colliders. 4.The Bern-Kosower rule has been known only up to one-loop. We extend it to arbitrary number of loops in scalar quantum electrodynamics. 5.We construct a new set of equations for Green functions in scalar field theory. Un-like Schwinger-Dyson equations, the new equations form a closed set, which may be solvable with no approximation.
超対称な模型に対する現在の制限と将来の検証可能性の系統的研究

日笠健一, 柳田勉

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 一般研究(C)

Institution: 東北大学

1993 - 1993

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当研究では,超対称大統一模型の枠内で興味深い模型を構成し,宇宙論や直接探索の制限から許されるパラメータ領域を決定することが目的であった。まず模型の構成については,最小統一模型では解決されていない(1)宇宙のバリオン非対称性の生成,(2)パラメータの微調整のない統一模型の構成,の二つの問題に焦点をあてた。(1)に関しては,村山,柳田は右巻きのニュートリノの質量が10^<10>GeV近辺にあれば,そのスカラー成分がインフレーション中に量子ゆらぎによって成長し,冷振動の崩壊によってレプトン非対称性を生成するという機構が働くことを発見した。この右巻きニュートリノの存在はSO(10)統一模型に有利である。また(2)については,SO(10)ではDimopoulos-Wilczekの模型を応用することで,10^<-6>という小さな定数が一つあることを認めさえすれば,微調整なしでヒッグス二重項をシーソー機構によって軽くできることがわかった。一方期せずしてLEPのデータはより複雑な模型(例えば中間スケールのあるもの)とも整合することがわかり,考えるべきパラメータ領域が一気に広がった。このためパラメータ領域の決定は今後に残された課題となった。自然界が超対称であったとすれば,超対称粒子が存在するだけでなく,結合定数の間にある種の関係がなりたっていなければならない。日笠は,この関係が超対称性の破れによってどのような影響を受けるかを,スカラークォークの崩壊率を例にとって調べた。この結果は論文として発表すべく準備中である。
BEYOND THE STANDARD MODEL AND COSMOLOGY

YOSHIMURA Tomohiko, HIKASA K, YOSHIMURA M, YANAGIDDA T

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for General Scientific Research (C)

Institution: TOHOKU UNIVERSITY

1991 - 1993

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THIS YEAR BLACK HOLE EVAPORATION DUE'TO HAWKING RADIATION HAS BEEN MAINLY STUDIED. IT IS WELL KNOWN THAT BLACK HOLE SPACETIME ENDOWED WITH EVENT HORIZON ADMITS PARTICLE PRODUCTION WITH THERMAL SPECTRUM.IF THIS PROCESS CONTINUES UNTIL COMPLETE EVAPORTION OF COLLAPSED OBJECT, THERE IS A DANGER OF PURE QUANTUM STATE EVOLVING INTO A MIXED THERMAL STATE : A CLEAR SIGNAL OF VIOLATION OF QUANTUM MECHANICAL LAW.TO SOLVE THIS FOUNDAMENTAL PROBLEM IT IS HOWEVER NECESSARY TO TREAT THE BACK REACTION PROPERLY. IN THIS INVESTIGATION A SIMPLIFIED APPROACH BASED ON A TRUNCATED DEGREE OF FREEDOM WAS TAKEN.MAIN RESULTS ARE ; TWO DIMENSINAL CLASSICAL COLLAPSE MODE WAS CONSTRUCTED : HAWKING RADIATION IN THE SEMICLASSICAL APPROXIMATION : ANALYSIS OF END POINT BEHAVIOR WITH BACK REACTION IN CLUDED, IN A PARTICULAR MODEL.
Phenomenological Study of Gauge Theory

IGI Kenji, SASAKI Ken, KURIMOTO Takeshi, HIOKI Yoshio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Co-operative Research (A)

Institution: The University of Tokyo

1991 - 1993

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(1)Origin of electro weak symmetry breaking If Higgs boson is very heavy, weak interaction beckomes strong and we cannot rely on pertubation. Igi and Hikasa analyzed the scattering amplitude of WW scatterring by using the equivalence theorem. analiticity and N/D method and discussed pssibility to detect the strong interaction in e^+e^-collider. Yonezawa studied higher order corrections of electro-weak interactions. (2)Phvsics of Hadrons Hioki studied non-leptonic decay of B mesons and semi-leptonic decay of Lambda particles by using the heave quark effective theory. Kurimoto calculated this effective Lagrangian yp to 1/M corrections. Terasaki studied weak decay of K,B mesons by incorpolating various harons in intermeiate states. Kooshita analyzed cascade model of hadrons with diffract (3)Nutorino Hikasi showed that a possibility of heavy nutorino as dark matter in halos can be excluded. Kurimoto studied the effect of inhomogeneity of magnetic field in sun on nutorino oscillation. Suematu discussed the atmospheric nutorono and solar nuturino problem in susy GUT. (4)Others Sasaki analyzed op condensation mechanism in SUSY theory and predicted mass of top quark from 150 to 190 Gev. Yamawaki studied quantum effect of effective theory based on hidden local symmetry. Watanabe studied fundamental research on low temperature detecter for dark matter, monopole and solar nutorino.
Study of New Phenomena by the Collider LEP at CERN

SHIMIZU Yoshimitsu, TOBIMATSU Keijirou, YAZAKI Shigeo, JIMBO Masato, IGARASHI Masataka, ISHIKAWA Tadashi, KURIHARA Yoshimasa, FUJII Keisuke, MIYAMOTO Akiya, FUJIMOTO Junpei, HIKASA Ken-ichi, HAGIWARA Kaoru, HIGASHIJIMA Kiyoshi, KAWABATA Setsuya, KON Tadashi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for international Scientific Research

Institution: National Laboratory for High Energy Physics (KEK)

1991 - 1992

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The prompt photon production process is observed in LEP experiments. We have examined the process e^+e^-*qqgamma including one-loop QCD correction. This research is done using different regularization method by Japanese group by French group. In LEP experiments, events with two leptons and two photons are observed, which are suspected to be a new phenomenon. By use of GRACE system, the system to generate Feynman diagrams and to generate matrix elements for a corresponding process,we have calculated the cross section for e^+e^-*ll^^-gammagamma in electro-weak theory, whether the events are conventional ones based on the higher order QED interaction. Though the experimental signal exceeds the above background expectations, the origin of these is still uncertain due to the experimental controversy. Using the GRACE system, we have done systematic computation of the processes with three- and four-particle final states in high energy e^+e^- experiments, e.g., LEPH, JLC and so forth. The estimation of the strong coupling constant is done by studying experimental data by the parton shower model NLLjet and by the analytic calculation including resummation. The formulation of QED parton shower is done, so that the decoration of higher order QED correction for an arbitrary elementary process becomes possible. The numerical method developed for one-loop amplitude is also extended to multi-loop case. A new system for the symbolic manipulation is developed It has the feature to contract the expressions which appear in the calculation in particle physics. Some processes including the production of the super-particles are studied and the possible signal expected in the future colliders is shown. To execute the phase space integration efficiently, a new method for the numerical integration is investigated.
Physics at Tristan

SHIMIZU Yoshimitsu, HIKASA Kenichi, LIM Seiji, HAGIWARA Kaoru

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for General Scientific Research (C)

1988 - 1990

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1. The calculation of radiative corrections in unified electro-weak theory has been accomplished, and the whole results have been published in the journal, Progr. Theor Phys. 2. A computer program, which can automatically calculate the amplitudes and crosssections of all possible processes in unified electro-weak theory and QCD was made, and the successful results have been reported in international conferences. 3. The review of the jet generation method based on QCD, which is one of the most important achievement in the present research project, is now under preparation. This will be the most important subject in the Tristan experiment from now on. 4. A quantitative analysis of higher order QCD corrections to the e^-e^+ annihilation cross sections at Tristan and LEP have been done. 5. The uncertainty in the evaluation of Kobayashi-Maskawa matrix element has been estimated, by analyzing semi-leptonic B decay processes in different models. 6. The production cross section of bound states made of colored particles, like topponium, has been considered. 7. A possibility that scalar top particle in super, symmetric theory is produced at Tristan energy region has been studied. 8. Slightly larger than expected hadronic production rate at Tristan and Z decay width at LEP have been measured. The possibility that these are due to the radiative corrections of super particles was investigated.
Theoretical Research of New Phenomena by Large ElectronーPosition Collider Lep at Cern

SUGAWARA Hirotaka, MUNEHISA Tomo, KATO Kiyoshi, NAKAZAWA Nobuya, IGARASHI Masataka, HIKAWSA Kenーichi, KANEKO Toshiaki, HAGIWARA Kaoru, HIGASHIJIMA Kiyoshi, SHIMIZU Yoshimitsu

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for international Scientific Research

Institution: National Laboratory for High Energy Physics

1988 - 1990

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Experiments at e^+e^- collisions have been found to be very efficient in studying elementary particles and their interactions, In Japan, experiments at TRISTAN is underway. We investigate consequences of the electroweak theory, jet phenomena, and searches for new particles at the collider LEP which probes even higher energies.
PARTICLE PHYSICS AT TRISTAN RANGE

KOBAYASHI MAKOTO, HIKASA KEN-ICHI, HAGIWARA KAORU, YUKAWA TETSUYUKI, SHIMIZU YOSHIMITSU, SUGAWARA HIROTAKA

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for General Scientific Research (C)

Institution: NATIONAL LABORATORY FOR HIGH ENERGY PHYSICS(KEK)

1986 - 1987

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Physics experiments at TRISTAN e^+e^- collider started in 1987.Operations at the beam energy of 25.0,26.0 and 27.5 Gev have been finished by the end of 1987 and experiments at 28.0 Gev are in progress. Under these circumstances,the present research project is organized to study theoretical aspects of TRISTAN physics.Emphasis is put on the study of the radiative corrections and the phenomenology of the supersymmetric theory. As for the radiative corrections,calculations have been done for the processes of lepton-pair productions,photon-pair productions,top-quark-pair productions and jet-pair productions.Corrections to the process of e^+e^- -><nu><nu><gamma>,which is useful for counting a neutrino flavor number,are also estimated. In relation to the supersymmetric theory,various possibilities of detecting evidences of the supersymmetry at TRISTAN are studied.Among them the light scalar top is investigated extensively.From this study,it is found that existing calculations of decay amplitudes contain several errors.Beside the scalar top problem,relation to pp colliders and new types of interactions predicted by the superstring theory are also investigated.

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