Chiral phase transition with 2+1 quark flavors in an improved soft-wall AdS/QCD model

Fang, Zhen (Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China) (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China) (CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China) ; Wu, Yue-Liang (CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China) (International Centre for Theoretical Physics Asia-Pacific (ICTP-AP), University of Chinese Academy of Sciences, Beijing 100049, China) ; Zhang, Lin (CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China) (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

07 December 2018

Abstract: We study the chiral phase transition with 2+1 quark flavors in an improved soft-wall AdS/QCD model, which can produce the light meson spectrum and many other low-energy quantities consistent with experiments in the two-flavor case. The chiral transition behaviors of the quark condensates at different quark masses are analyzed in detail, and the (mu,d, ms) phase diagram for the quark sector has been obtained from the improved soft-wall model. We find that the features of the calculated phase diagram are completely consistent with the standard scenario, which is supported by lattice simulations and theoretical arguments. The evidence of a tricritical point on the mu,d=0 boundary of the (mu,d, ms) phase diagram is first clearly presented in the bottom-up AdS/QCD.


Published in: Physical Review D 98 (2018)
Published by: APS
DOI: 10.1103/PhysRevD.98.114003
arXiv: 1805.05019
License: CC-BY-4.0



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