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

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K23444
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0203:Particle-, nuclear-, astro-physics, and related fields
• Research Institution: Hiroshima 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
• 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

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.

Free Research Field

高エネルギー原子核実験

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。