Integrated study of photon production in hot and dense quark matter

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K14722
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Japan Women's University (2020-2021); High Energy Accelerator Research Organization (2019)
• Principal Investigator: MONNAI Akihiko 日本女子大学, 理学部, 講師 (20709357)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 原子核理論 / クォークグルーオンプラズマ / 光子

Outline of Final Research Achievements

High-energy nuclear collisions produce a high-temperature matter of several trillion degrees called quark-gluon plasma. The investigator has developed a theoretical framework to understand the momentum distribution of the photons created in such collisions. Numerical simulations are performed based on relativistic hydrodynamic model by considering pre-equilibrium photons emitted before the formation of the quark matter in addition to thermal and prompt photons. It has been found that the effects of pre-equilibrium photons can be important. The investigator has also constructed the equation of state at high temperatures and densities to elucidate the properties of the quark matter.

Free Research Field

原子核理論

Academic Significance and Societal Importance of the Research Achievements

本研究では相対論的流体モデルに基づく原子核衝突における光子生成の理論計算において、これまで考慮されてこなかった非平衡光子の影響を取り入れることで、理論模型の定量性を高めることができた。また、原子核衝突で生成される高温高密度クォーク物質に関する幅広い知見を得ることができた。これらの成果は素粒子物理と非平衡統計物理の融合分野としての原子核物理の発展に対して大きく貢献するものである。