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Gravitational wave radiation from binary primordial black holes and its cosmological consequences

Research Project

Project/Area Number 17F17322
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

横山 順一  東京大学, 大学院理学系研究科(理学部), 教授 (50212303)

Co-Investigator(Kenkyū-buntansha) WU YI-PENG  東京大学, 理学(系)研究科(研究院), 外国人特別研究員
Project Period (FY) 2017-10-13 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2019: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2018: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2017: ¥500,000 (Direct Cost: ¥500,000)
Keywords原始ブラックホール / 重力波 / ダークマター / インフレーション / ヒッグス場 / タキオン不安定性 / インフレーション宇宙論 / 非ガウス性 / 単一場インフレーションモデル / ブラックホール熱力学 / 宇宙の相転移 / 曲率ゆらぎ
Outline of Annual Research Achievements

本研究費によってサポートされた外国人特別研究員の行った研究は以下の通りです。
なお、全研究経費を同人が執行しました。
原始ブラックホール(PBH)を全暗黒物質(DM)密度の重要な要素として考える宇宙論的理論を研究しました。まず、初期宇宙インフレーションからPBH存在量を推定するための標準統計手法を改訂しました。次に、標準モデルの素粒子物理学と宇宙における物質と物質の非対称性の問題によって動機付けられた、初期宇宙でのPBH形成につながる可能性のある理論を導き出しました。研究成果は、フェローシップ期間中および期間を超えて、日本、台湾、香港、チェコ共和国、フランス、中国で開催されたいくつかの国際会議で発表されました。
初期宇宙のインフレーションを起こす場の運動項がヒッグス場と結合し、非正準的な運動項を持つ場合について、“Higgs as heavy-lifted physics during inflation,” という論文においてヒッグス場の原点の近くでタキオン不安定性が起こり、ヒッグス場が量子ゆらぎによって不均一に発展することから、重力波が生成することを示しました。このモデルの主要な理解を得るために、インフレーション中に生成された曲率摂動の非ガウス相関関数における非標準的なヒッグス-インフラットン結合の特徴的な信号が用いられ、ヒッグス場の非ガウス符号が次世代の調査の観測可能性に到達できることが示されています。 それに引き続く論文“Leptogenesis from spontaneous symmetry breaking during inflation,”では、このモデルが宇宙で観測された物質と物質の非対称性を説明できることをさらに示しています。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (20 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (12 results) (of which Int'l Joint Research: 11 results,  Invited: 4 results)

  • [Int'l Joint Research] UCLA(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 香港科学技術大学(その他の国・地域 (香港))

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Leptogenesis from spontaneous symmetry breaking during inflation2019

    • Author(s)
      Wu Yi-Peng、Yang Louis、Kusenko Alexander
    • Journal Title

      Journal of High Energy Physics

      Volume: 2019 Issue: 12 Pages: 088-088

    • DOI

      10.1007/jhep12(2019)088

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Higgs as heavy-lifted physics during inflation2019

    • Author(s)
      Wu Yi-Peng
    • Journal Title

      Journal of High Energy Physics

      Volume: 2019 Issue: 4 Pages: 125-125

    • DOI

      10.1007/jhep04(2019)125

    • Related Report
      2019 Annual Research Report 2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loop corrections to primordial fluctuations from inflationary phase transitions2018

    • Author(s)
      Wu Yi-Peng、Yokoyama Jun'ichi
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2018 Issue: 05 Pages: 009-009

    • DOI

      10.1088/1475-7516/2018/05/009

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hybrid quasi-single field inflation2018

    • Author(s)
      Wang Yi、Wu Yi-Peng、Yokoyama Jun'ichi、Zhou Siyi
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2018 Issue: 07 Pages: 068-068

    • DOI

      10.1088/1475-7516/2018/07/068

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Loop corrections to primordial fluctuations from inflationary phase transitions2018

    • Author(s)
      Yi-Peng Wu and Jun'ichi Yokoyama
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 印刷中

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Role of spacetime boundaries in Eisntein's other gravity2017

    • Author(s)
      Naritaka Oshita and Yi-Peng Wu
    • Journal Title

      Physical Review D

      Volume: 96 Issue: 4 Pages: 044042-044042

    • DOI

      10.1103/physrevd.96.044042

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Black hole mass function from peaks of primordial density perturbations2019

    • Author(s)
      Yi-Peng Wu
    • Organizer
      RESCEU Summer School 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cosmological consequences of heavy Higgs relaxation: from leptogensis to gravity wave production2019

    • Author(s)
      Yi-Peng Wu
    • Organizer
      2019 Zhuhai Forum at Sun Yat-Sen University
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Leptogenesis from heavy Higgs relaxation2019

    • Author(s)
      Yi-Peng Wu
    • Organizer
      IAS program on particle theory, Hong Kong University of Science and Technology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inflationary particle production and non-Gaussianity2018

    • Author(s)
      Yi-Peng Wu
    • Organizer
      5th International Workshop on “Dark Matter, Dark Energy and Matter-Antimatter Asymmetry,”
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Higgs as heavy-lifted physics during inflation2018

    • Author(s)
      Yi-Peng Wu
    • Organizer
      28th Workshop on General Relativity and Gravitation in Japan (JGRG28)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] What is inflation in Cosmology?2018

    • Author(s)
      Yi-Peng Wu and H.W.H. Tahara
    • Organizer
      JSPS Science Dialogue Program 川越女子高校
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Search for hybrid inflation with the cosmological collider2018

    • Author(s)
      Yi-Peng Wu
    • Organizer
      COSMO-18
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Search for heavy physics in the cosmological collider2018

    • Author(s)
      Yi-Peng Wu
    • Organizer
      RESCEU Summer School 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Loop corrections to cosmological correlators from inflationary phase transitions2017

    • Author(s)
      Yi-Peng Wu
    • Organizer
      ESCEU Summer School
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inflationary phase transitions in the primordial fluctuations2017

    • Author(s)
      Yi-Peng Wu
    • Organizer
      017 NCTS Workshop on Dark Matter, Particles and Cosmos
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Inflationary fluctuations with phase transitions2017

    • Author(s)
      Yi-Peng Wu
    • Organizer
      27th Workshop on General Relativity and Gravitation in Japan (JGRG27)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inflationary fluctuations with phase transitions2017

    • Author(s)
      Yi-Peng Wu
    • Organizer
      COSPA2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research

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Published: 2017-10-17   Modified: 2024-03-26  

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