• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Lead Nuclear Collision at LHC: Exploring Its Initial Stage with Photons

Research Project

Project/Area Number 19H01928
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionHiroshima University

Principal Investigator

Sugitate Toru  広島大学, 先進理工系科学研究科(理), 名誉教授 (80144806)

Co-Investigator(Kenkyū-buntansha) 中條 達也  筑波大学, 数理物質系, 講師 (70418622)
三好 隆博  広島大学, 先進理工系科学研究科(理), 助教 (60335700)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2020: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Keywordsクォーク物質 / フォトン物理 / ALICE実験 / クォークグルーオンプラズマ / QGP
Outline of Research at the Start

私たちは欧州CERN研究所ALICE実験に建設導入したフォトン検出器PHOS及びジェット対検出器DCALを主要検出器としてLHC加速器が最高性能を発揮する第2期衝突実験に臨み、わが国大学チームが牽引する特色あるフォトン物理を責任ある立場で展開してきた。本研究は大学チームとしての主体性と独自性を発揮しながら、理論研究者とも協働して次の目標達成を目指す。

■ LHC鉛原子核衝突@5.0TeV/Aにおけるフォトン物理RUN2総括
■ 早期平衡化を探る超前方フォトン検出器FoCal開発及びRUN3実証機投入
■ 普遍的な拡がりをもった新たな学術分野「強く相互作用する量子多体系」開拓

Outline of Final Research Achievements

High-statistical data analysis of RUN2 was initiated, and distortions in TPC tracks were discovered. In parallel with the correction efforts, comprehensive photon analysis was performed with various measurements with PHOS, EMC, DCAL, and PCM. Although preliminary, a single-photon energy distribution emitted in Pb-Pb collisions at 5.02 TeV/A was presented for the first time at an international conference. Development of FoCal, an ultra-forward detector to elucidate the extreme early stages of nuclear collisions, was developed under collaborating work, where the team Japan played a leading role. Our extensive studies with theoretical researchers opened a broad interdisciplinary field, where non-linear and none-equilibrium nature governs a many-body quantum system.

Academic Significance and Societal Importance of the Research Achievements

高エネルギー原子核衝突が創る高温物質の探求はLHC加速器実験2期10年を経過した。2009年初衝突以来、様々な知見を明らかにしてきた。その物質は単光子を熱輻射した。熱力学的平衡に達した熱源が存在し、ハドロン存在限界温度を越えるクォーク物質であることを証した。その探求は非摂動的QCDの振る舞いを理解するに留まらず、自発的対称性の破れた量子場という自然の核心的概念に結びつく。高エネルギー実験は極度にグローバル化した分野である。研究者は国籍問わず緊密に連携した共同体を立ち上げ、そこに掲げた目標に向けて日々議論し行動する。近年の事象はその基盤を奪った。私たちは強くその回復に努力する。

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (37 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (18 results) Journal Article (18 results) (of which Int'l Joint Research: 18 results,  Peer Reviewed: 18 results,  Open Access: 18 results) Remarks (1 results)

  • [Int'l Joint Research] CERN研究所(スイス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] グルノーブル研究所(LPSC)(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] オークリッジ国立研究所/ローレンスバークレイ国立研究所(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] NIKHEF研究所/ユトレヒト大学(オランダ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] VECC研究所/BARC研究所(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] CERN研究所(スイス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] グルノーブル研究所(LPSC)(フランス)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] オークリッジ国立研究所/ローレンスバークレイ国立研究所(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] NIKHEF研究所/ユトレヒト大学(オランダ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] VECC研究所/BARC研究所(インド)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] CERN研究所(スイス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] グルノーブル研究所(LPSC)(フランス)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] オークリッジ国立研究所/ローレンスバークレイ国立研究所(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] NIKHEF研究所/ユトレヒト大学(オランダ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] VECC研究所/BARC研究所(インド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Exploring the NΛ-NΣ coupled system with high precision correlation techniques at the LHC2022

    • Author(s)
      ALICE Collaboration
    • Journal Title

      Physics Letters B

      Volume: 833 Pages: 137272-137272

    • DOI

      10.1016/j.physletb.2022.137272

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Direct observation of the dead-cone effect in quantum chromodynamics2022

    • Author(s)
      ALICE Collaboration
    • Journal Title

      Nature

      Volume: 605 Issue: 7910 Pages: 440-446

    • DOI

      10.1038/s41586-022-04572-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of the Groomed Jet Radius and Momentum Splitting Fraction in pp and Pb-Pb collisions at √s_NN = 5.02 TeV2022

    • Author(s)
      ALICE collaboration
    • Journal Title

      Physical Review Letters

      Volume: 128 Issue: 10 Pages: 102001-102001

    • DOI

      10.1103/physrevlett.128.102001

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lambda^+_c production in pp and in p-Pb collisions at sqrt(s_NN) =5.02 TeV2021

    • Author(s)
      The ALICE collaboration, S. Acharya, T. Chujo, T. Hachiya, M. Inaba, Y. Miake, N. Novitzky, K. Oyama, M. Shimomura, T. Sugitate, et al.
    • Journal Title

      Physical Review C

      Volume: 104 Issue: 5 Pages: 054905-054905

    • DOI

      10.1103/physrevc.104.054905

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Jet-associated deuteron production in pp collisions at sqrt(s)=13 TeV2021

    • Author(s)
      The ALICE collaboration, S. Acharya, T. Chujo, T. Hachiya, M. Inaba, Y. Miake, N. Novitzky, K. Oyama, M. Shimomura, T. Sugitate, et al.
    • Journal Title

      Physics Letters B

      Volume: 819 Pages: 136440-136440

    • DOI

      10.1016/j.physletb.2021.136440

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Production of pions, kaons, (anti-)protons and phi mesons in Xe-Xe collisions at sqrt(s_NN) = 5.44 TeV2021

    • Author(s)
      The ALICE collaboration, S. Acharya, T. Chujo, T. Hachiya, M. Inaba, Y. Miake, N. Novitzky, K. Oyama, M. Shimomura, T. Sugitate, et al.
    • Journal Title

      The European Physical Journal C

      Volume: 81 Issue: 7 Pages: 584-584

    • DOI

      10.1140/epjc/s10052-021-09304-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Design and performance of a silicon-tungsten calorimeter prototype module and the associated readout2021

    • Author(s)
      Awes T., Britton C.L., Chujo T. et al.
    • Journal Title

      Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

      Volume: 988 Pages: 164796-164796

    • DOI

      10.1016/j.nima.2020.164796

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unveiling the strong interaction among hadrons at the LHC2020

    • Author(s)
      S. Acharya, T. Chujo et al. (ALICE Collaboration)
    • Journal Title

      Nature

      Volume: 588 Issue: 7837 Pages: 232-238

    • DOI

      10.1038/s41586-020-3001-6

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Production of omega mesons in pp collisions at sqrt(s) =7 TeV2020

    • Author(s)
      S. Acharya, T. Chujo et al. (ALICE Collaboration)
    • Journal Title

      The European Physical Journal C

      Volume: 80 Issue: 12 Pages: 1130-1130

    • DOI

      10.1140/epjc/s10052-020-08651-y

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of isolated photon-hadron correlations in sqrt(s_NN) = 5.02 TeV pp and p-Pb collisions2020

    • Author(s)
      S. Acharya, T. Chujo et al. (ALICE Collaboration)
    • Journal Title

      Physical Review C

      Volume: 102 Issue: 4 Pages: 044908-044908

    • DOI

      10.1103/physrevc.102.044908

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A short note on reconstruction variables in shock capturing schemes for magnetohydrodynamics2020

    • Author(s)
      Miyoshi Takahiro、Minoshima Takashi
    • Journal Title

      Journal of Computational Physics

      Volume: 423 Pages: 109804-109804

    • DOI

      10.1016/j.jcp.2020.109804

    • Related Report
      2020 Annual Research 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
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Multistate Low-dissipation Advection Upstream Splitting Method for Ideal Magnetohydrodynamics2020

    • Author(s)
      Minoshima Takashi、Kitamura Keiichi、Miyoshi Takahiro
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 248 Issue: 1 Pages: 12-12

    • DOI

      10.3847/1538-4365/ab8aee

    • Related Report
      2020 Annual Research 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 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Calibration of the photon spectrometer PHOS of the ALICE experiment2019

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

      Journal of Instrumentation

      Volume: 14 Issue: 05 Pages: P05025-P05025

    • DOI

      10.1088/1748-0221/14/05/p05025

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of jet radial profiles in Pb-Pb collisions at √sNN=2.76 TeV2019

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

      Physics Letters B

      Volume: 796 Pages: 204-219

    • DOI

      10.1016/j.physletb.2019.07.020

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of the inclusive isolated photon production cross section in pp collisions at √s =7 TeV2019

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

      The European Physical Journal C

      Volume: 79 Issue: 11 Pages: 11-11

    • DOI

      10.1140/epjc/s10052-019-7389-9

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of charged jet cross section in pp collisions at √s=5.02TeV2019

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

      Physical Review D

      Volume: 100 Issue: 9 Pages: 092004-092004

    • DOI

      10.1103/physrevd.100.092004

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Remarks] LHC ALICE実験 日本グループ

    • URL

      http://alice-j.org

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi