Chiral phase transition from the Dyson-Schwinger equations in a finite spherical volume Supported by the National Natural Science Foundation of China (11475085, 11535005, 11690030, 11574145)

Zhao, Ya-Peng ( School of Physics, Nanjing University, Nanjing 210093, China) ; Zhang, Rui-Rui ( School of Physics, Nanjing University, Nanjing 210093, China) ; Zhang, Han ( School of Physics, Nanjing University, Nanjing 210093, China) ( Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China) ; Zong, Hong-Shi ( School of Physics, Nanjing University, Nanjing 210093, China) ( State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, CAS, Beijing 100190, China) ( Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093, China)

20 May 2019

Abstract: Within the framework of the Dyson-Schwinger equations and by means of Multiple Reflection Expansion, we study the effect of finite volume on the chiral phase transition in a sphere, and discuss in particular its influence on the possible location of the critical end point (CEP). According to our calculations, when we take a sphere instead of a cube, the influence of finite volume on phase transition is not as significant as previously calculated. For instance, as the radius of the spherical volume decreases from infinite to 2 fm, the critical temperature , at zero chemical potential and finite temperature, drops only slightly. At finite chemical potential and finite temperature, the location of CEP shifts towards smaller temperature and higher chemical potential, but the amplitude of the variation does not exceed 20%. As a result, we find that not only the size of the volume but also its shape have a considerable impact on the phase transition.


Published in: Chinese Phys. C 43 (2019) 063101
Published by: Institute of Physics Publishing/Chinese Academy of Sciences
DOI: 10.1088/1674-1137/43/6/063101
arXiv: 1903.11243
License: CC-BY-3.0



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