Research on inflationary universe and density perturbation based on

• Project/Area Number: 21740160
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Tohoku University (2010-2011); The University of Tokyo (2009)
• Principal Investigator: TAKAHASHI Fuminobu 東北大学, 大学院・理学研究科, 准教授 (60503878)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 宇宙物理 / 素粒子論 / インフレーション / ヒッグス / 超対称性 / 非ガウス性 / 暗黒物質

Research Abstract

The ATLAS and CMS collaborations at the LHC experiment reported hints of a standard model Higgs boson at about 125GeV, which can be naturally explained in a supersymmetric framework with supersymmetry breaking at 100-1000TeV. I studied its cosmological implications and proposed an inflation model based on U(1)B-L gauge symmetry. In this model the inflationary scale places an upper limit on the supersymmery breaking which explains the Higgs mass naturally.

Research Products

• [Journal Article] Dark radiation from modulated reheating (2012)
  • Author(s): F. Takahashi et al
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 1203 Issue: 03 Pages: 36-36
  • DOI: 10.1088/1475-7516/2012/03/036
  • Peer Reviewed
• [Journal Article] Low-scale Supersymmetry from Inflation (2011)
  • Author(s): Kazunori Nakayama and Fuminobu Takahashi
  • Journal Title: JCAP Volume: 1110 Pages: 33-33
  • Peer Reviewed
• [Journal Article] Non-Gaussianity from Curvatons Revisited (2011)
  • Author(s): Masahiro Kawasaki, Takeshi Kobayashi, and Fuminobu Takahashi
  • Journal Title: JCAP Volume: 1101 Pages: 26-26
  • Peer Reviewed
• [Journal Article] A theory of extra radiation in the Universe (2011)
  • Author(s): Kazunori Nakayama, Fuminobu Takahashi, Tsutomu Yanagida
  • Journal Title: Phys. Lett. Volume: B697 Pages: 275-279
  • Peer Reviewed
• [Journal Article] Low-scale Supersymmetry from Inflation (2011)
  • Author(s): K.Nakayama, F.Takahashi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 1110 Issue: 10 Pages: 33-33
  • DOI: 10.1088/1475-7516/2011/10/033
  • Peer Reviewed
• [Journal Article] On the Adiabatic Solution to the Polonyi/Moduli Problem (2011)
  • Author(s): K.Nakayama, F.Takahashi, T.T.Yanagida
  • Journal Title: Physical Review D Volume: 84 Issue: 12 Pages: 123523-123523
  • DOI: 10.1103/physrevd.84.123523
  • Peer Reviewed
• [Journal Article] Running spectral index from Inflation with modulations (2011)
  • Author(s): T.Kobayashi, F.Takahashi
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 01:026 Pages: 1-15
  • Peer Reviewed
• [Journal Article] A theory of extra radiation (2011)
  • Author(s): K.Nakayama, F.Takahashi, T.Yanagida
  • Journal Title: Physics Letters B Volume: 697 Pages: 275-279
  • Peer Reviewed
• [Journal Article] Dark matter from Spilit Seesaw (2010)
  • Author(s): Alexander Kusenko, Fuminobu Takahashi, Tsutomu Yanagida
  • Journal Title: Phys. Lett. Volume: B693 Pages: 144-148
  • Peer Reviewed
• [Journal Article] Linear Inflation from Running Kinetic Term in Supergravity (2010)
  • Author(s): Fuminobu Takahashi
  • Journal Title: Phys. Lett Volume: B693L Pages: 140-143
  • Peer Reviewed
• [Journal Article] Gamma-ray Constraints on Hadronic and Leptonic Activities od Decaying Dark Matter (2010)
  • Author(s): Chuan-Ren Chen, Sourav Mandal, and Fuminobu Takahahshi
  • Journal Title: JCAP Volume: 1001 Pages: 23-23
  • Peer Reviewed
• [Journal Article] Linear Inflation from Running Kinetic Term in Supergravity (2010)
  • Author(s): F.Takahashi
  • Journal Title: Physics Letters B Volume: 693 Pages: 140-143
  • Peer Reviewed
• [Journal Article] Gamma-ray Constraints on Hadronic and Leptonic Activities of Decaying Dark Matter (2010)
  • Author(s): Chuan-Ren Chen, Sourav Mandal, Fuminobu Takahashi
  • Journal Title: Journal of Cosmology and Astroparticle Physics 1001:023
  • Peer Reviewed
• [Journal Article] Non-Gaussianity from Isocurvature Perturbations : Analysis of Trispectrum (2009)
  • Author(s): E.Kawakami, M.Kawasaki, K.Nakayama, F.Takahashi
  • Journal Title: Journal of Cosmology and Astroparticle Physics 0909:002
  • Peer Reviewed
• [Journal Article] The R-axion and non-Gaussianity (2009)
  • Author(s): Kazunori Nakayama, Fuminobu Takahashi
  • Journal Title: Physics Letters B 679 Pages: 436-439
  • Peer Reviewed
• [Presentation] インフレーションの再加熱過程における非熱的グラビティーノ問題の発見 (2011)
  • Author(s): 高橋史宜
  • Organizer: 日本物理学会
  • Place of Presentation: 弘前大学
  • Year and Date: 2011-09-17
• [Presentation] Higgs Chaotic Inflation with a Running Kinetic Term (2010)
  • Author(s): F.Takahashi
  • Organizer: COSMO/CosPA 2010
  • Place of Presentation: 東京大学
  • Year and Date: 2010-09-29
• [Presentation] Dark matter from Split Seesaw (2010)
  • Author(s): 高橋史宜
  • Organizer: 日本物理学会
  • Place of Presentation: 九州工業大学
  • Year and Date: 2010-09-13
• [Presentation] グラビティーノ問題とその後の発展 (2009)
  • Author(s): 高橋史宜
  • Organizer: 日本物理学会
  • Place of Presentation: 甲南大学
  • Year and Date: 2009-09-13