| THE PHYSICS OF ELEMENTARY PARTICLES AND FIELDS |
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Discussion of Various Susceptibilities within Thermal and Dense Quantum Chromodynamics |
| XU Shu-Sheng1,5, SHI Yuan-Mei1,2, YANG You-Chang1,3, CUI Zhu-Fang1,5, ZONG Hong-Shi1,4,5** |
1Department of Physics, Nanjing University, Nanjing 210093
2Department of Physics and Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171
3School of Physics and Mechanical-Electrical Engineering, Zunyi Normal College, Zunyi 563002
4Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093
5State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190 |
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| Cite this article: |
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XU Shu-Sheng, SHI Yuan-Mei, YANG You-Chang et al 2015 Chin. Phys. Lett. 32 121203 |
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Abstract It is commonly accepted that the system undergoes a crossover at high temperature and low chemical potential beyond the chiral limit case, and the properties of the crossover region are important for researchers to understand the nature of strong interacting matters of quantum chromodynamics (QCD). Since at present there is no exact order of parameters of the phase transitions beyond the chiral limit, QCD susceptibilities are widely used as indicators. In this work various susceptibilities are discussed in the framework of Dyson–Schwinger equations. The results show that different kinds of susceptibilities give the same critical end point, which is the bifurcation point of the crossover region and the first order phase transition line of QCD. Nevertheless, different pseudo-critical points are found in the temperature axis. We think that defining a critical band is more suitable in the crossover region.
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Received: 15 August 2015
Published: 05 January 2016
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| PACS: |
12.39.-x
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(Phenomenological quark models)
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12.39.Fe
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(Chiral Lagrangians)
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25.75.Nq
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(Quark deconfinement, quark-gluon plasma production, and phase transitions)
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