Search for the critical point of lattice QCD at high temperature and density focusing on probability distribution functions

2017 Fiscal Year Final Research Report

• Project/Area Number: 26400244
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Niigata University
• Principal Investigator: Ejiri Shinji 新潟大学, 自然科学系, 准教授 (10401176)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 素粒子論 / 計算物理

Outline of Final Research Achievements

We studied quantum chromodynamics (QCD) at high temperature and density by numerical simulations. Treating the quark masses as parameters of the system as well as the temperature and chemical potential, we investigated the nature of phase transitions by calculating probability distribution functions.
We investigated the critical surface which separates the first order transition and crossover regions in the heavy quark region, and demonstrated the usefulness of our method. The pressure gap and the latent heat between the two phases at the first phase transition were calculated when the quark mass is infinite. Furthermore, we tried calculation of thermodynamic quantities using the gradient flow method which has recently attracted attention.

Free Research Field

物理学