Toward the origins of lepton flavour violation and SUSY breaking from analysis on vacuum structure

• Project/Area Number: 23740190
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: University of Miyazaki (2014); Niigata University (2011-2013)
• Principal Investigator: SHIMOMURA Takashi 宮崎大学, 教育文化学部, 准教授 (00447278)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 超対称性 / 真空構造 / ヒッグス / レプトンフレーバーの破れ / 電弱対称性の破れ / 素粒子論

Outline of Final Research Achievements

I have analyzed the vacuum structure of scalar potentials in supersymmetric models and showed the existance of some new vacua. Such new vacua include so-called false vacua on which the Universe we live is never realized. I derived the conditions to avoid the false vacua and gave new constraints on the parameters of supersymmetry breaking terms, Higgs mass terms and neutrino mass terms. Especially, based on latest data reported from the LHC experiment, I have analyzed the vacuum structure of the Next-to-Minimal Supersymmetric Standard Model implementing the Mirage mediation, which can explain the mass of the Higgs particle, and gave constraints on the supersymmetry breaking parameters.

Research Products

• [Journal Article] Cosmic neutrino spectrum and the muon anomalous magnetic moment in the gauged Lμ－Lτ model (2015)
  • Author(s): Takeshi Araki, Fumihiro Kaneko, Yasufumi Konishi, Toshihiko Ota, Joe Sato, Takashi Shimomura
  • Journal Title: Physical Review D Volume: 91 Issue: 3 Pages: 037301-037301
  • DOI: 10.1103/physrevd.91.037301
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Neutrino Mass and Proton Decay in a U(1)R Symmetric Model (2013)
  • Author(s): Y. Morita, H. Nakano, T. Shimomura
  • Journal Title: PTEP 2013 Volume: 2013 Issue: 5 Pages: 21-21
  • DOI: 10.1093/ptep/ptt016
  • Peer Reviewed
• [Journal Article] First evidence of the constrained minimal supersymmetric standard model is appearing soon (2013)
  • Author(s): Yasufumi Konishi, Shingo Ohta, Joe Sato, Takashi Shimomura, Kenichi Sugai, Masato Yamanaka
  • Journal Title: Physical Review D Volume: 89 Pages: 75006-75006
  • Peer Reviewed
• [Journal Article] Neutrino Mass and Proton Decay in a U(1)R Symmetric Model (2013)
  • Author(s): Yusuke Morita
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 印刷中
  • Peer Reviewed
• [Journal Article] Allowed slepton intergenerational mixing in light of light element abundances (2012)
  • Author(s): Kazunori Kohri, Shingo Ohta, Joe Sato, Takashi Shimomura, Masato Yamanaka
  • Journal Title: Physical Review D Volume: 86 Issue: 9 Pages: 95024-95024
  • DOI: 10.1103/physrevd.86.095024
  • Peer Reviewed
• [Journal Article] TeV scale mirage mediation in NMSSM (2012)
  • Author(s): Tatsuo Kobayashi
  • Journal Title: Journal of High Energy Physics Volume: 1301 Issue: 1 Pages: 81-81
  • DOI: 10.1007/jhep01(2013)081
  • Peer Reviewed
• [Journal Article] Constraining the Higgs sector from False Vacua in the Next-to-Minimal Supersymmetric Standard Model (2012)
  • Author(s): Tatsuo Kobayashi
  • Journal Title: Physical Review D Volume: 86 Issue: 1 Pages: 15029-15029
  • DOI: 10.1103/physrevd.86.015029
  • Peer Reviewed
• [Journal Article] Constraints from unrealistic vaua in the NMSSM (2011)
  • Author(s): Y.Kanehata, T.Kobayashi, et.al.
  • Journal Title: Prog.Theor.Phys. Volume: 126 Issue: 6 Pages: 1051-1076
  • DOI: 10.1143/ptp.126.1051
  • NAID: 110008897248
  • Peer Reviewed
• [Presentation] Li問題を解決する長寿命スタウとSUSY spectrum (2014)
  • Author(s): Takashi Shimomura
  • Organizer: テラスケール2014
  • Place of Presentation: 大阪大学
  • Year and Date: 2014-11-29
• [Presentation] Cosmic Neutrino Spectrum and (g-2)μ in the gauged Lμ - Lτ model (2014)
  • Author(s): Takashi Shimomura
  • Organizer: KEK-PH 2014
  • Place of Presentation: 高エネルギー加速器研究機構
  • Year and Date: 2014-10-24
• [Presentation] First evidence of CMSSM is appearing soon (2014)
  • Author(s): Takashi Shimomura
  • Organizer: 基研研究会 素粒子物理学の進展2014
  • Place of Presentation: 京都大学 基礎物理学研究所
  • Year and Date: 2014-07-30
• [Presentation] TeV scale Mirage Mediation in the NMSSM (2012)
  • Author(s): Takashi Shimomura
  • Organizer: DESY Theory workshop
  • Place of Presentation: Hamburg, Germany
• [Presentation] TeV scale Mirage Mediation in the NMSSM (2012)
  • Author(s): Takashi Shimomura
  • Organizer: 20th International Conference on Supersymmetry and Unification of Fundamental Interactions
  • Place of Presentation: Pekin, China
• [Presentation] Constraining the Higgs masses from false vacua in the next-to minimal supersymmetric standard model. (2011)
  • Author(s): 下村崇, 小林達夫, 高橋翼
  • Organizer: 日本物理学会
  • Place of Presentation: 青森大学