Investigation of dark matter and vacuum structure via flavor physics

• Project Area: New expansion of particle physics of post-Higgs era by LHC revealing the vacuum and space-time structure
• Project/Area Number: 17H05404
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Nagoya University
• Principal Investigator: 大村 雄司 名古屋大学, 基礎理論研究センター, 准教授 (00772097)
• Project Period (FY): 2017-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 暗黒物質模型の検証 / 素粒子理論 / フレーバー物理 / 暗黒物質 / 素粒子論

Outline of Annual Research Achievements

宇宙の真空構造と暗黒物質(DM)の解明のため(未知の)弱い相互作用をする暗黒物質模型に焦点を絞り、DM の直接観測と間接観測、LHC 実験での新物理直接探索、フレーバー物理からのDM 模型の検証を行った。昨年度の研究を基に、単純化された暗黒物質模型((1)とする)と具体的な素粒子標準模型の問題点に基づいた模型((2)とする)を構築し、その中で暗黒物質に関する物理とフレーバー物理に特に焦点を置いて研究した。
(1)近年、LHCb実験やBファクトリー実験のフレーバー物理に関する観測量で素粒子標準模型からのズレが報告されている。そのズレに関して新物理の可能性を研究するだけでなく、背後に暗黒物質が存在する可能性を考え、論文(PRD96,no.7, 075041(2017), JHEP1902,194(2019))にまとめると共に、日本物理学会並びに国際研究会において、現在の進展状況を報告した。さらには物理学会誌の2019年3月号で最近のフレーバー物理に関する進展に関し報告した。
(2) 暗黒物質の可能性は数多く考えられている。その存在と素粒子標準模型の謎との関連を研究するため、具体的に問題点を改善する模型を構築し暗黒物質候補を探索した。具体的には、電弱相互作用のスケール起源とstrong CP問題を解決する超対称性LR模型を構築し、暗黒物質の候補を指摘し、レプトンのフレーバー物理による模型の検証方法を論(JHEP1811,046(2018))で提案した。近年では超対称性模型のない場合の模型の構築と暗黒物質の実現を研究しており、2019年3月の学会で結果を公表した。

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] D* polarization vs. R_{D^{(*)}} anomalies in the leptoquark models (2019)
  • Author(s): Iguro Syuhei、Kitahara Teppei、Omura Yuji、Watanabe Ryoutaro、Yamamoto Kei
  • Journal Title: Journal of High Energy Physics Volume: 2019 Issue: 2 Pages: 046-046
  • DOI: 10.1007/jhep02(2019)194
  • Peer Reviewed / Open Access
• [Journal Article] Flavor physics in the multi-Higgs doublet models induced by the left-right symmetry (2018)
  • Author(s): Iguro Syuhei、Muramatsu Yu、Omura Yuji、Shigekami Yoshihiro
  • Journal Title: Journal of High Energy Physics Volume: 2018 Issue: 11 Pages: 194-194
  • DOI: 10.1007/jhep11(2018)046
  • Peer Reviewed
• [Journal Article] Spontaneous SUSY breaking without R symmetry in supergravity (2018)
  • Author(s): Maekawa Nobuhiro、Omura Yuji、Shigekami Yoshihiro、Yoshida Manabu
  • Journal Title: Physical Review D Volume: 97 Issue: 5 Pages: 055015-055015
  • DOI: 10.1103/physrevd.97.055015
  • Peer Reviewed / Open Access
• [Journal Article] LHCb anomaly and B physics in flavored Z′ models with flavored Higgs doublets (2017)
  • Author(s): Ko P.、Omura Yuji、Shigekami Yoshihiro、Yu Chaehyun
  • Journal Title: Physical Review D Volume: 95 Issue: 11 Pages: 115040-115040
  • DOI: 10.1103/physrevd.95.115040
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hidden sector behind the CKM matrix (2017)
  • Author(s): Okawa Shohei、Omura Yuji
  • Journal Title: Physical Review D Volume: 96 Issue: 3 Pages: 035012-035012
  • DOI: 10.1103/physrevd.96.035012
  • Peer Reviewed
• [Journal Article] Study of dark matter physics in non-universal gaugino mass scenario (2017)
  • Author(s): Kawamura Junichiro、Omura Yuji
  • Journal Title: JHEP Volume: 08 Issue: 8 Pages: 072-072
  • DOI: 10.1007/jhep08(2017)072
  • Peer Reviewed / Open Access
• [Journal Article] Realization of a spontaneous gauge and supersymmetry breaking vacuum (2017)
  • Author(s): T.Kobayashi, Y.Omura, O.Seto, and K.Ueda
  • Journal Title: JHEP Volume: 11 Issue: 11 Pages: 073-073
  • DOI: 10.1007/jhep11(2017)073
  • NAID: 120006370607
  • Peer Reviewed / Open Access
• [Journal Article] Interplay between the b→sll anomalies and dark matter physics (2017)
  • Author(s): Kawamura Junichiro、Okawa Shohei、Omura Yuji
  • Journal Title: Physical Review D Volume: 96 Issue: 7 Pages: 075041-075041
  • DOI: 10.1103/physrevd.96.075041
  • Peer Reviewed
• [Journal Article] Analysis of the TeV-scale mirage mediation with heavy superparticles (2017)
  • Author(s): Kawamura Junichiro、Omura Yuji
  • Journal Title: JHEP Volume: 11 Issue: 11 Pages: 189-189
  • DOI: 10.1007/jhep11(2017)189
  • Peer Reviewed / Open Access
• [Journal Article] Two-loop anomalous dimensions for four-Fermi operators in supersymmetric theories (2017)
  • Author(s): Hisano Junji、Kuwahara Takumi、Omura Yuji、Sato Takeki
  • Journal Title: Nuclear Physics B Volume: 922 Pages: 77-93
  • DOI: 10.1016/j.nuclphysb.2017.06.021
  • Peer Reviewed / Open Access
• [Journal Article] Scale generation via dynamically induced multiple seesaw mechanisms (2017)
  • Author(s): Hiroyuki Ishida, Shinya Matsuzaki, Shohei Okawa, Yuji Omura
  • Journal Title: Physical Review D Volume: 95 Issue: 7 Pages: 075033-07504
  • DOI: 10.1103/physrevd.95.075033
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Flavor Physics in Beyond Standard Models (2017)
  • Author(s): Omura Yuji
  • Journal Title: PoS Volume: KMI2017 Pages: 009-009
  • DOI: 10.22323/1.294.0009
• [Presentation] Interplay between LHC and flavors (2019)
  • Author(s): 大村雄司
  • Organizer: The 4th KMI International Symposium (KMI2019)
  • Int'l Joint Research / Invited
• [Presentation] WIMP dark matter expected by the solution of the strong CP problem (2019)
  • Author(s): 大村雄司
  • Organizer: 日本物理学会 第74回年次大会
• [Presentation] 標準模型を超えた新物理 (2018)
  • Author(s): 大村雄司
  • Organizer: 加速器・物理合同 ILC 夏の合宿 2018
  • Invited
• [Presentation] Status of 2HDMs in the Flavor Physics (2018)
  • Author(s): 大村雄司
  • Organizer: 新テラスケール研究会
  • Invited
• [Presentation] WIMP dark matter expected in the parity solution to the strong CP problem (2018)
  • Author(s): 大村雄司
  • Organizer: KEK-PH 2018 winter
  • Int'l Joint Research
• [Presentation] Realization of a spontaneous gauge and supersymmetry breaking vacuum (2018)
  • Author(s): 大村雄司
  • Organizer: Beyond the BSM (The 4th Kavli IPMU-Durham IPPP-KEK-KIAS workshop)
  • Int'l Joint Research
• [Presentation] Flavor physics in the multi-Higgs doublet models induced by the left-right symmetry (2018)
  • Author(s): 大村雄司
  • Organizer: ICHEP2018
  • Int'l Joint Research
• [Presentation] Realization of a spontaneous gauge and supersymmetry breaking vacuum (2018)
  • Author(s): 大村雄司
  • Organizer: SUSY2018
  • Int'l Joint Research
• [Presentation] Status of the semileptonic B decays and muon g-2 in general 2HDMs (2018)
  • Author(s): 大村雄司
  • Organizer: The 22th regular meeting of the new Higgs working group
  • Int'l Joint Research
• [Presentation] Flavor physics in the multi-Higgs doublet models induced by the left-right symmetry (2018)
  • Author(s): 大村雄司
  • Organizer: 日本物理学会 秋季大会
• [Presentation] Hidden sector behind the quark mixing (2018)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2018)
  • Int'l Joint Research / Invited
• [Presentation] Status of the semileptonic B decays and muon g-2 in general 2HDMs (2018)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: BrAinstorming on paRticle physics and Astrophysics phenoMenology (BARAM)
  • Int'l Joint Research / Invited
• [Presentation] Hidden sector behind the CKM matrix (2018)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: 日本物理学会第73 回年次大会
• [Presentation] Flavor violation in the Beyond Standard Model (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: Flavor physics workshop 2017
  • Invited
• [Presentation] The New physics interpretations of the b to s ll anomalies and the impact on dark matter physics (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: The 21st LHC Physics Monthly Meeting: B- and K-physics anomalies
  • Int'l Joint Research / Invited
• [Presentation] The b to s ll anomalies and the new physics interpretations (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: 関西現象論勉強会
  • Invited
• [Presentation] New physics interpretation of the b to s ll anomalies (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: 「Anomalies in b to sll and its implications 」研究会
  • Invited
• [Presentation] Realization of a spontaneous gauge and supersymmetry breaking vacuum (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: The 3rd Winter Toyama Mini-Workshop on Particle Physics and Cosmology \Basis of the Universe with Revolutionary Ideas 2018 (BURI2018)"
  • Int'l Joint Research
• [Presentation] Realization of a spontaneous gauge and supersymmetry breaking vacuum (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: KMI workshop "GUTs"
  • Int'l Joint Research
• [Presentation] Hidden sector behind the CKM matrix (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: Summer Institute 2017
  • Int'l Joint Research
• [Presentation] Impact of the b to s ll anomalies on dark matter physics (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: Dark Side of the Universe
  • Int'l Joint Research
• [Presentation] Hidden sector behind the CKM matrix (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: PASCOS 2017
  • Int'l Joint Research
• [Presentation] Constraints on the b to sll anomalies at the LHCb from dark matter and LHC physics (2017)
  • Author(s): 大村 雄司 (Yuji Omura)
  • Organizer: 日本物理学会秋季大会