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Theoretical study of dense nuclear and neutron-star matter with the precise many-body calculations

Research Project

Project/Area Number 17K14298
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionTokyo University of Science

Principal Investigator

Miyatsu Tsuyoshi  東京理科大学, 理工学部物理学科, 助教 (00779209)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords核物質状態方程式 / 対称エネルギー / (非)対称核物質 / 中性子星 / 理論核物理 / 中性子星物質 / 核物質の状態方程式
Outline of Final Research Achievements

Using the relativistic nuclear theory based on high-accuracy many-body calculations, the main purpose in the present study is to understand theoretically physical phenomena concerning resect nuclear terrestrial experiments and astrophysical observations.
It is found that nuclear matter properties including symmetry energy and slope parameter are determined well using the many-body calculations. It is also possible to explain not only the maximum mass and typical radius of neutron stars but also the tidal deformabilities with the unified nuclear equation of state.

Academic Significance and Societal Importance of the Research Achievements

核物質の性質に関する研究や中性子星の特性に関する研究は古くから行われているが、両者を統一的に扱い理解することは理論物理学の悲願である。本研究では、相対論の枠組みの中で多体計算の精度を向上したことにより、両者の統一的な説明が可能となった。さらに、天体観測から得られる情報は、核物質の性質を決定するに当たり非常に重要であることと、多体計算精度の更なる向上が将来的に不可欠であることを示した。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (30 results)

All 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (7 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 7 results,  Open Access: 7 results) Presentation (15 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Remarks (4 results)

  • [Int'l Joint Research] Soongsil University/Institute for Basic Science/Korea Aerospace University(韓国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Soongsil University/Korea Aerospace University(韓国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Soongsil University/Korea Aerospace University(韓国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Soongsil University/Korea Aerospace University(韓国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Constraints on Nuclear Saturation Properties from Terrestrial Experiments and Astrophysical Observations of Neutron Stars2021

    • Author(s)
      Choi Soonchul、Miyatsu Tsuyoshi、Cheoun Myung-Ki、Saito Koichi
    • Journal Title

      The Astrophysical Journal

      Volume: 909 Issue: 2 Pages: 156-156

    • DOI

      10.3847/1538-4357/abe3fe

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Role of Fock Terms on Nuclear Symmetry Energy and its Slope Parameter in a Relativistic Framework2020

    • Author(s)
      Miyatsu Tsuyoshi、Cheoun Myung-Ki、Ishizuka Chikako、Kim K. S.、Maruyama Tomoyuki、Saito Koichi
    • Journal Title

      JPS Conference Proceedings

      Volume: 32 Pages: 010072-010072

    • DOI

      10.7566/jpscp.32.010072

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Constraints on the Nuclear Saturation Properties Using Experimental Data and Astrophysical Observations2020

    • Author(s)
      Choi Soonchul、Miyatsu Tsuyoshi、Cheoun Myung-Ki、Saito Koichi
    • Journal Title

      JPS Conference Proceedings

      Volume: 31 Pages: 011058-011058

    • DOI

      10.7566/jpscp.31.011058

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Decomposition of nuclear symmetry energy based on Lorentz-covariant nucleon self-energies in relativistic Hartree-Fock approximation2020

    • Author(s)
      Tsuyoshi Miyatsu, Myung Ki Cheoun, Chikako Ishizuka, K. S. Kim, Tomoyuki Maruyama, Koichi Saito
    • Journal Title

      Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

      Volume: 803 Pages: 135282-135282

    • DOI

      10.1016/j.physletb.2020.135282

    • Related Report
      2020 Annual Research Report 2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Equation of State for Neutron Stars in the Quark-Meson Coupling Model with the Cloudy Bag2019

    • Author(s)
      Tsuyoshi Miyatsu, Koichi Saito
    • Journal Title

      JPS Conference Proceedings

      Volume: -

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Properties of Neutron Stars with Hyperons and Quarks Using Relativistic Hartree-Fock Approximation and MIT Bag Model2017

    • Author(s)
      Tsuyoshi Miyatsu, Myung-Ki Cheoun, Koichi Saito
    • Journal Title

      JPS Conference Proceedings

      Volume: 17 Pages: 102004-102004

    • DOI

      10.7566/jpscp.17.102004

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Equation of state for hybrid stars with strangeness2017

    • Author(s)
      [ 全著者名 ] Tsuyoshi Miyatsu, Takahide Kambe, Koichi Saito
    • Journal Title

      Proceeding of science

      Volume: INPC2016 Pages: 135-135

    • DOI

      10.22323/1.281.0135

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Modified quark-meson coupling 模型による非対称核物質についての考察2021

    • Author(s)
      伊藤遼吾, 宮津剛志, 齋藤晃一
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 宮津剛志, Soonchul Choi, B, Myung-Ki Cheoun, 齋藤晃一2021

    • Author(s)
      地上実験と天体観測の結果から考える核物質状態方程式の制限
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 対称エネルギーにおける中間子混合とクォークの影響2020

    • Author(s)
      伊藤遼吾, 金子祐也, 宮津剛志, 齋藤晃一
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 対称エネルギーEsymにおけるクォーク構造の影響2020

    • Author(s)
      伊藤遼吾, 金子祐也, 宮津剛志, 齋藤晃一
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 地上実験と天体観測の情報から核物質の性質はどのくらい制限されるのか?2020

    • Author(s)
      宮津剛志, Soonchul Choi, Myung‐Ki Cheoun, 齋藤晃一
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Fock contribution to nuclear symmetry energy and its slope parameter based on Lorentz-covariant decomposition of nucleon self-energies2019

    • Author(s)
      Tsuyoshi Miyatsu
    • Organizer
      9th International Symposium on Nuclear Symmetry Energy (NuSYM2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effect of Fock terms on nuclear symmetry energy based on Lorentz-covariant decomposition of nucleon self-energies2019

    • Author(s)
      Tsuyoshi Miyatsu, Myung-Ki Cheoun, Chikako Ishizuka, K. S. Kim, Tomoyuki Maruyama, Koichi Saito
    • Organizer
      The 27th International Nuclear Physics Conference (INPC 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Constraints on the Nuclear Saturation Properties using Experimental Data and Astrophysical Observations2019

    • Author(s)
      Choi Soonchul、Miyatsu Tsuyoshi、Cheoun Myung-Ki、Saito Koichi
    • Organizer
      The 15th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG15)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] The role of Fock terms on nuclear symmetry energy in a relativistic framework2018

    • Author(s)
      Tsuyoshi Miyatsu, Myung-Ki Cheoun, Chikako Ishizuka, Kyungsik Kim, Tomoyuki Maruyama, Koichi Saito
    • Organizer
      8th International Symposium on Nuclear Symmetry Energy (NuSYM2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Quark-meson coupling model with the cloudy bag and its application to nuclear and neutron-star properties2018

    • Author(s)
      Tsuyoshi Miyatsu, Koichi Saito
    • Organizer
      5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Equation of state for neutron stars in the quark-meson coupling model with the cloudy bag2018

    • Author(s)
      Tsuyoshi Miyatsu, Koichi Saito
    • Organizer
      8th International Conference on Quarks and Nuclear Physics (QNP2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] The role of Fock terms on nuclear symmetry energy and its slope parameter in a relativistic framework2018

    • Author(s)
      T. Miyatsu, K. Saito, Myung-Ki Cheoun, C. Ishizuka, K. Kim, T. Maruyama
    • Organizer
      13th International Conference on Nucleus-Nucleus Collisions (NN2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 相対論的枠組みにおける核物質計算とFock項の効果2018

    • Author(s)
      宮津剛志, Myung-Ki Cheoun, 石塚知香子, Kyungsik Kim, 丸山智幸, 齋藤晃一
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Density and momentum dependence of nuclear symmetry energy in the relativistic Hartree-Fock approximation2017

    • Author(s)
      Tsuyoshi Miyatsu, Myung-Ki Cheoun, Chikako Ishizuka, Kyungsik Kim, Tomoyuki Maruyama, Koichi Saito
    • Organizer
      The 7th International Symposium on Nuclear Symmetry Energy
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 相対論的Hartree-Fock計算による対称エネルギーの密度と運動量依存性2017

    • Author(s)
      宮津剛志, Myung-Ki Cheoun, 石塚知香子, Kyungsik Kim, 丸山智幸, 齋藤晃一
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Remarks] 東京理科大学

    • URL

      https://www.tus.ac.jp/fac_grad/p/achievement.php?5a74

    • Related Report
      2019 Research-status Report
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/tsuyoshi.miyatsu

    • Related Report
      2019 Research-status Report
  • [Remarks] Pure

    • URL

      https://tus.elsevierpure.com/en/persons/tsuyoshi-miyatsu

    • Related Report
      2019 Research-status Report
  • [Remarks] Researchgate

    • URL

      https://www.researchgate.net/profile/Tsuyoshi_Miyatsu

    • Related Report
      2019 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2022-02-22  

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