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arXiv · 1506.06846

2+1 flavors QCD equation of state at zero temperature within Dyson-Schwinger equations

Shu-Sheng Xu·Yan Yan·Zhu-Fang Cui·Hong-Shi Zong
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Abstract

Within the framework of Dyson-Schwinger equations (DSEs), we discuss the equation of state (EOS) and quark number densities of 2+1 flavors, that is to say, $u$, $d$, and $s$ quarks. The chemical equilibrium and electric charge neutrality conditions are used to constrain the chemical potential of different quarks. The EOS in the cases of 2 flavors and 2+1 flavors are discussed, and the quark number densities, the pressure, and energy density per baryon are also studied. The results show that there is a critical chemical potential for each flavor of quark, at which the quark number density turns to nonzero from 0; and furthermore, the system with 2+1 flavors of quarks is more stable than that with 2 flavors in the system. These discussion may provide some useful information to some research fields, such as the studies related to the QCD phase transitions or compact stars.

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Shu-Sheng Xu, Yan Yan, Zhu-Fang Cui, Hong-Shi Zong. 2015-06-23. 2+1 flavors QCD equation of state at zero temperature within Dyson-Schwinger equations. https://doi.org/10.1142/s0217751x15502176

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