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Understanding of hadron mass origin by forward muon pair measurements in high-energy heavy-ion collisions

Research Project

Project/Area Number 19K23444
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0203:Particle-, nuclear-, astro-physics, and related fields
Research InstitutionHiroshima University (2020)
Nagasaki Institute of Applied Science (2019)

Principal Investigator

Yano Satoshi  広島大学, 先進理工系科学研究科(理), 助教 (20850720)

Project Period (FY) 2019-08-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsカイラル対称性 / クォーク ・グルーオン・プラズマ / QGP / 高エネルギー原子核衝突実験 / ALICE実験 / 高エネルギー原子核衝突 / クォーク・グルーオン・プラズマ / カイラル対象性
Outline of Research at the Start

高温媒質内における低質量ベクトル中間子の質量測定は、「カイラル対称性の自発的破れによるハドロン質量の生成」の直接的検証になると期待される。しかし、信号対雑音比(S/N比)が小さいため、この検証は未だに成功していない。
本研究は、新型シリコン飛跡検出器(Muon Forward Tracker:MFT)をALICE検出器群に組み込むことで、μ粒子対質量分解能を向上させ、高温媒質内ベクトル中間子質量の高精度測定を実現する。質量分布の系統的測定から、理論的解釈の不定性を取り除き、カイラル対称性とハドロン質量の関係を明らかにする。

Outline of Final Research Achievements

In this study, I develop a new silicon pixel tracking detector (Muon Forward Tracker: MFT) to obtain the experimental evidence that directly links hadron mass and chiral symmetry, and install it into the CERN-LHC ALICE experiment. By combining the MFT and the existing ALICE muon detector (MUON), highly accurate measurement of the low mass vector meson mass distribution that is sensitive to obtain the evidence will be realized. Aiming to operate the MFT from LHC-Run3 (2022-), (1) final commissioning of the MFT, (2) development of track reconstruction algorithm using the MFT, (3) evaluation of the existing MUON performance using LHC-Run2 real data, have been done.

Academic Significance and Societal Importance of the Research Achievements

本研究はハドロン物理学の積年の課題である「物質の質量獲得機構の解明」に決着をつける。また、過去最高衝突エネルギーLHC加速器で高温媒質が生成する「物理的中央領域」がビーム軸方向に拡張し、低横運動量ミュー粒子の粒子識別が可能な「測定技術的前方領域」と重なる。本研究は、このLHC加速器が拓く「衝突点前方ミュー粒子を用いた中央物理の研究」という新たな探針を開拓する。高エネルギー重イオン衝突実験に新しい視点を与え、物質の創生機構、真空構造、初期宇宙の時空発展の理解を加速させる。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (16 results) (of which Int'l Joint Research: 16 results,  Peer Reviewed: 16 results,  Open Access: 16 results) Presentation (2 results)

  • [Int'l Joint Research] CEA Paris-Saclay(フランス)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Coherent photoproduction of ρ0 vector mesons in ultra-peripheral Pb-Pb collisions at √sNN = 5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Journal of High Energy Physics

      Volume: 6 Issue: 6 Pages: 35-35

    • DOI

      10.1007/jhep06(2020)035

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Higher harmonic non-linear flow modes of charged hadrons in Pb-Pb collisions at √sNN = 5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Journal of High Energy Physics

      Volume: 5 Issue: 5 Pages: 85-85

    • DOI

      10.1007/jhep05(2020)085

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Investigation of the p-Σ0 interaction via femtoscopy in pp collisions2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physics Letters B

      Volume: 805 Pages: 135419-135419

    • DOI

      10.1016/j.physletb.2020.135419

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Centrality and transverse momentum dependence of inclusive J/ψ production at midrapidity in Pb-Pb collisions at √sNN =5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physics Letters B

      Volume: 805 Pages: 135434-135434

    • DOI

      10.1016/j.physletb.2020.135434

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Longitudinal and azimuthal evolution of two-particle transverse momentum correlations in Pb-Pb collisions at √sNN=2.76TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physics Letters B

      Volume: 804 Pages: 135375-135375

    • DOI

      10.1016/j.physletb.2020.135375

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Production of (anti-)$^{3}$He and (anti-)$^{3}$H in p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV2020

    • Author(s)
      S. Acharya, S.Yano, 他
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 4 Pages: 044906-044906

    • DOI

      10.1103/physrevc.101.044906

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Underlying event properties in pp collisions at √s = 13 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Journal of High Energy Physics

      Volume: 4 Issue: 4 Pages: 192-192

    • DOI

      10.1007/jhep04(2020)192

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Production of (anti-)3He and (anti-)3H in p-Pb collisions at √sNN =5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physical Review C

      Volume: 101 Pages: 135225-135225

    • DOI

      10.1016/j.physletb.2020.135225

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of electrons from heavy-flavour hadron decays as a function of multiplicity in p-Pb collisions at √sNN = 5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Journal of High Energy Physics

      Volume: 2 Issue: 2 Pages: 77-77

    • DOI

      10.1007/jhep02(2020)077

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Jet-hadron correlations measured relative to the second order event plane in Pb-Pb collisions at √sNN=2.76TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 6 Pages: 064901-064901

    • DOI

      10.1103/physrevc.101.064901

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of electrons from semileptonic heavy-flavour hadron decays at midrapidity in pp and Pb-Pb collisions at √sNN=5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physics Letters B

      Volume: 804 Pages: 135377-135377

    • DOI

      10.1016/j.physletb.2020.135377

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of the (anti-)3He elliptic flow in Pb-Pb collisions at √sNN=5.02TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physics Letters B

      Volume: 805 Pages: 135414-135414

    • DOI

      10.1016/j.physletb.2020.135414

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Production of charged pions, kaons, and (anti-)protons in Pb-Pb and inelastic pp collisions at √sNN=5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 4 Pages: 044907-044907

    • DOI

      10.1103/physrevc.101.044907

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurements of inclusive jet spectra in pp and central Pb-Pb collisions at √sNN=5.02TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 3 Pages: 034911-034911

    • DOI

      10.1103/physrevc.101.034911

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Studies of J/ψ production at forward rapidity in Pb-Pb collisions at √sNN = 5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Journal of High Energy Physics

      Volume: 2 Issue: 2 Pages: 41-41

    • DOI

      10.1007/jhep02(2020)041

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Global polarization of ΛΛ-bar hyperons in Pb-Pb collisions at √sNN= 2.76 and 5.02 TeV2020

    • Author(s)
      Acharya S., Shimomura M. and et al. for the ALICE Collaboration
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 4 Pages: 044611-044611

    • DOI

      10.1103/physrevc.101.044611

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Forward muon reconstruction performance with ALICE in Run32021

    • Author(s)
      八野哲
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 前方ミュー粒子の多重散乱を考慮した ALICE 実験 Run 3 における飛跡再構成2021

    • Author(s)
      江島廉, 志垣賢太, 八野哲, 山口頼人
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Annual Research Report

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Published: 2019-09-03   Modified: 2022-01-27  

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