Equation of state and transition temperatures in the quark-hadron hybrid model

被引：9

作者：

Miyahara, Akihisa ^{[1
]}

Torigoe, Yuhei ^{[1
]}

Kouno, Hiroaki ^{[2
]}

Yahiro, Masanobu ^{[1
]}

机构：

[1] Kyushu Univ, Grad Sch Sci, Dept Phys, Fukuoka 8190395, Japan

[2] Saga Univ, Dept Phys, Saga 8408502, Japan

来源：

PHYSICAL REVIEW D | 2016年 / 94卷 / 01期

基金：

日本学术振兴会;

关键词：

QCD; THERMODYNAMICS;

D O I：

10.1103/PhysRevD.94.016003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the equation of state of 2 + 1 flavor lattice QCD at zero baryon density by constructing a simple quark-hadron hybrid model that has both quark and hadron components simultaneously. We calculate the hadron and quark contributions separately and parameterize those to match with lattice QCD data. Lattice data on the equation of state are decomposed into hadron and quark components by using the model. The transition temperature is defined by the temperature at which the hadron component is equal to the quark one in the equation of state. The transition temperature thus obtained is about 215 MeV; this is somewhat higher than the chiral and the deconfinement pseudocritical temperatures defined by the temperature at which the susceptibility or the absolute value of the derivative of the order parameter with respect to temperature becomes maximum.

引用

页数：10

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