Mechanism for generating baryonic and dark matter in the universe and particle physics model beyond the Standard Model

• Project/Area Number: 25400249
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Niigata University
• Principal Investigator: ASAKA Takehiko 新潟大学, 自然科学系, 准教授 (70419993)
• Co-Investigator(Kenkyū-buntansha): 渡邊 篤史 京都産業大学, 益川塾, 研究員 (60567519) ; 谷本 盛光 新潟大学, 自然科学系, フェロー (90108366) ; 中野 博章 新潟大学, 自然科学系, 准教授 (60262424)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: ニュートリノ / 宇宙暗黒物質 / 宇宙バリオン数 / 素粒子論 / 素粒子理論 / 宇宙バリオン数の起源 / ニュートリノ質量の起源 / ニュートリノ質量 / 宇宙バリオン数生成

Outline of Final Research Achievements

We have investigated physics beyond the Standard Model based on the origin of non-zero neutrino masses indicated by oscillation experiments. In particular, a framework in which neutrino masses, cosmic dark matter, and baryon asymmetry of the universe can be explained at the same time has been considered. We have focused on right-handed neutrinos which masses are lighter than the electroweak scale (about 100 GeV) and discussed the mechanism for generating the baryon asymmetry and the methods of the experimental searches for such particles.

Research Products

• [Journal Article] CP violating phase from minimal texture neutrino mass matrix: Test of the phase relevant to leptogenesis (2017)
  • Author(s): Masataka Fukugita, Yuya Kaneta, Yusuke Shimizu, Morimitsu Tanimoto, Tutomu T. Yanagida
  • Journal Title: Physics Letters B Volume: 764 Pages: 163-166
  • DOI: 10.1016/j.physletb.2016.11.024
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] On neutrinoless double beta decay in the nuMSM (2016)
  • Author(s): T. Asaka, S. Eijima and H. Ishida
  • Journal Title: Physics Letters B Volume: 762 Pages: 371-375
  • DOI: 10.1016/j.physletb.2016.09.044
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Lepton number violation by heavy Majorana neutrino in B decays (2016)
  • Author(s): T. Asaka and H. Ishida
  • Journal Title: Physics Letters B Volume: 763 Pages: 393-396
  • DOI: 10.1016/j.physletb.2016.10.070
  • NAID: 130006709933
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A facility to search for hidden particles at the CERN SPS: the SHiP physics case (2016)
  • Author(s): S. Alekhin, W. Altmannshofer, T. Asaka et al
  • Journal Title: Reports on Progress in Physics Volume: 79 Issue: 12 Pages: 124201-124201
  • DOI: 10.1088/0034-4885/79/12/124201
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Occam’s razor in lepton mass matrices: The sign of the universe’s baryon asymmetry (2016)
  • Author(s): Yuya Kaneta, Yusuke Shimizu, Morimitsu Tanimoto, Tutom T. Yanagida
  • Journal Title: PTEP Volume: 2016 Issue: 6 Pages: 1-13
  • DOI: 10.1093/ptep/ptw079
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Probing heavy neutrinos in the COMET experiment (2016)
  • Author(s): Takehiko Asaka, Atsushi Watanabe
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2016 Issue: 3 Pages: 033B03-033B03
  • DOI: 10.1093/ptep/ptw011
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Perturbativity in the seesaw mechanism (2016)
  • Author(s): Takehiko Asaka, Takanao Tsuyuki
  • Journal Title: Physics Letters B Volume: 753 Pages: 147-149
  • DOI: 10.1016/j.physletb.2015.12.013
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Occam's Razor in Quark Mass Matrices (2016)
  • Author(s): Morimitsu Tanimoto, Tsutomu T. Yanagida
  • Journal Title: PTEP Volume: 2016 Issue: 4 Pages: 043B03-043B03
  • DOI: 10.1093/ptep/ptw024
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Next-to-minimal R-symmetric model: Dirac gaugino, Higgs mass and invisible width (2016)
  • Author(s): Hiroaki Nakano, Masaki Yoshikawa
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 2016 Issue: 3 Pages: 033B01-033B01
  • DOI: 10.1093/ptep/ptw007
  • Peer Reviewed / Open Access
• [Journal Article] Seesaw mechanism at electron-electron colliders (2015)
  • Author(s): Takehiko Asaka, Takanao Tsuyuki
  • Journal Title: Physical Review D Volume: 92 Issue: 9 Pages: 094012-094012
  • DOI: 10.1103/physrevd.92.094012
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Testing the minimal S4 model of neutrinos with the Dirac and Majorana phases (2015)
  • Author(s): Yusuke Shimizu, Morimitsu Tanimoto
  • Journal Title: JHEP Volume: 1512 Issue: 12 Pages: 132-132
  • DOI: 10.1007/jhep12(2015)132
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Sensitivity of High-Scale SUSY in Low Energy Hadronic FCNC (2015)
  • Author(s): Morimitsu Tanimoto, Kei Yamamoto
  • Journal Title: Symmetry Volume: 7 Issue: 2 Pages: 689-713
  • DOI: 10.3390/sym7020689
  • Peer Reviewed / Open Access
• [Journal Article] Lepton Universality in the nuMSM (2015)
  • Author(s): T. Asaka, S. Eijima and K. Takeda
  • Journal Title: Physics Letters B Volume: 742 Pages: 303-309
  • DOI: 10.1016/j.physletb.2015.01.049
  • Peer Reviewed / Open Access
• [Journal Article] Linking Leptonic CP violation to Quark Unitarity Triangle (2015)
  • Author(s): M.Tanimoto and K.Yamamoto
  • Journal Title: JHEP Volume: 1504 Issue: 4 Pages: 037-037
  • DOI: 10.1007/jhep04(2015)037
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Sensitivity of the squark flavor mixing to the CP violation of K, BO and Bs mesons (2013)
  • Author(s): 清水勇介、谷本盛光、山本恵
  • Journal Title: Physics Letters B Volume: 726 Issue: 4-5 Pages: 747-757
  • DOI: 10.1016/j.physletb.2013.09.051
  • NAID: 110009754140
  • Peer Reviewed
• [Journal Article] Direc Search for Right-handed Neutrinos and Neutrinoless Double Beta Decay (2011)
  • Author(s): T. Asaka, S. Eijima
  • Journal Title: PTEP Volume: 11 Issue: 11 Pages: 113B02-113B02
  • DOI: 10.1093/ptep/ptt094
  • Peer Reviewed
• [Presentation] Enhancement of the effective mass of 0 nu beta beta decay in the nuMSM (2017)
  • Author(s): 石田裕之 （連名：淺賀岳彦, 永島伸多郎）
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学豊中キャンパス （大阪府・豊中市）
  • Year and Date: 2017-03-20
• [Presentation] Lepton number violation by heavy Majorana neutrino in B decays (2017)
  • Author(s): 淺賀岳彦 （連名：石田裕之）
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学豊中キャンパス （大阪府・豊中市）
  • Year and Date: 2017-03-18
• [Presentation] Physics of right-handed neutrinos with GeV-scale masses (2017)
  • Author(s): T. Asaka
  • Organizer: The 3rd Toyama International Workshop on "Higgs as a Probe of New Physics 2017"
  • Place of Presentation: 富山大学五福キャンパス （富山県・富山市）
  • Year and Date: 2017-03-05
  • Int'l Joint Research
• [Presentation] Lepton number violation by heavy Majorana neutrino in B decays (2016)
  • Author(s): 淺賀岳彦
  • Organizer: 第21回新潟・山形合宿
  • Place of Presentation: 国立磐梯青少年交流の家 （福島県・耶麻郡猪苗代町）
  • Year and Date: 2016-11-18
• [Presentation] Lepton number violation by heavy Majorana neutrino in B decays (2016)
  • Author(s): T. Asaka
  • Organizer: Flavor Physics Workshop 2016
  • Place of Presentation: 岩室温泉ゆもとや （新潟県・新潟市）
  • Year and Date: 2016-10-28
• [Presentation] Basic oscillation measurables in the neutrino pair beam (2016)
  • Author(s): 淺賀岳彦 （連名：田中実、吉村太彦）
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 宮崎大学木花キャンパス （宮崎県・宮崎市）
  • Year and Date: 2016-09-22
• [Presentation] Lepton number violations in the seesaw mechanism (2016)
  • Author(s): 淺賀岳彦
  • Organizer: 松江素粒子物理学研究会
  • Place of Presentation: 島根大学 松江キャンパス （島根県・松江市）
  • Year and Date: 2016-03-25
  • Invited
• [Presentation] Perturbativity in the seesaw mechanism (2016)
  • Author(s): 露木孝尚（連名：淺賀岳彦）
  • Organizer: 日本物理学会 第71回年次大会
  • Place of Presentation: 東北学院大学 泉キャンパス （宮城県・仙台市）
  • Year and Date: 2016-03-19
• [Presentation] Search for right-handed neutrinos in the seesaw mechanism (2015)
  • Author(s): 淺賀岳彦
  • Organizer: Particle Cosmology and beyond j2015
  • Place of Presentation: 金沢市アートホール （石川県・金沢市）
  • Year and Date: 2015-11-16
  • Int'l Joint Research / Invited
• [Presentation] Baryogenesis and and 0νββ decay in the νMSM (2015)
  • Author(s): 石田裕之（連名、淺賀岳彦、永島伸多郎）
  • Organizer: 日本物理学会 2015秋季大会
  • Place of Presentation: 大阪市立大学 杉本キャンパス （大阪府・大阪市）
  • Year and Date: 2015-09-25
• [Presentation] Physics of right-handed neutrinos (2015)
  • Author(s): 淺賀岳彦
  • Organizer: 基研研究会 素粒子物理学の進展2015
  • Place of Presentation: 京都大学基礎物理学研究所 （京都府・京都市）
  • Year and Date: 2015-09-14
  • Invited
• [Presentation] Neutrino theory of everything? dark matter, baryogenesis, neutrino mass (2015)
  • Author(s): 淺賀岳彦
  • Organizer: 25th International Workshop on Weak Interactions and Neutrinos (WIN2015)
  • Place of Presentation: MPIK Heidelberg, Heidelberg (Germany）
  • Year and Date: 2015-06-08
  • Int'l Joint Research / Invited
• [Presentation] レプトン数の破れから探る宇宙バリオン数生成機構の解明 (2015)
  • Author(s): 淺賀岳彦
  • Organizer: 「宇宙の歴史をひもとく地下素粒子原子核研究」2015年領域研究会
  • Place of Presentation: 神戸大学百年記念館 六甲ホール （兵庫県・神戸市）
  • Year and Date: 2015-05-15
• [Presentation] Neutrinoless double beta decay in the nuMSM (2015)
  • Author(s): 淺賀岳彦 （連名：永島伸多郎、石田裕之）
  • Organizer: 日本物理学会 第７０回年次大会
  • Place of Presentation: 早稲田大学、東京
  • Year and Date: 2015-03-21
• [Presentation] Probing Neutrino Masses and Cosmic Baryon Asymmetry at J-PARC (2015)
  • Author(s): Takehiko Asaka
  • Organizer: 国際会議 "Flavor of New Physics"
  • Place of Presentation: Ibaraki Quantum Beam Research Center, 東海村
  • Year and Date: 2015-03-10
  • Invited
• [Presentation] nuMSMにおけるレプトンユニバーサリティ (2014)
  • Author(s): 武田一浩 （連名：淺賀岳彦）
  • Organizer: 日本物理学会 ２０１４年秋季大会
  • Place of Presentation: 佐賀大学、佐賀
  • Year and Date: 2014-09-26
• [Presentation] Low-scale baryogenesis (2014)
  • Author(s): Takehiko Asaka
  • Organizer: 国際会議 "Xth Rencontres du Vietnam, Flavor Physics Conference"
  • Place of Presentation: ICISE, QUY NHON, Vietnam
  • Year and Date: 2014-08-01
  • Invited
• [Presentation] Overview of the nuMSM (2014)
  • Author(s): Takehiko Asaka
  • Organizer: 国際会議 "First SHiP Workshop"
  • Place of Presentation: Zurich, Switzerland
  • Year and Date: 2014-06-10
  • Invited
• [Presentation] Minimal value of Mixing Elements for Heavy Neutral Leptons (2014)
  • Author(s): 武田一浩 （連名：淺賀岳彦）
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学
• [Presentation] How to probe the origins of neutrino masses and baryon asymmetry of the universe (2013)
  • Author(s): 淺賀岳彦
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 高知大学
• [Presentation] 右巻きニュートリノとエントロピー生成 (2013)
  • Author(s): 武田一浩 （連名：淺賀岳彦）
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 高知大学
• [Presentation] Probing origins of neutrino masses and baryon asymmetry (2013)
  • Author(s): Takehiko Asaka
  • Organizer: The 3rd KIAS Workshop on Particle Physics and Cosmology
  • Place of Presentation: KIAS, Korea
  • Invited