Phase Diagram and Critical End Point for Strongly Interacting Quarks

Si-xue Qin, Lei Chang, Huan Chen, Yu-xin Liu, and Craig D. Roberts
Phys. Rev. Lett. 106, 172301 – Published 28 April 2011

Abstract

We introduce a method based on chiral susceptibility, which enables one to draw a phase diagram in the chemical-potential–temperature plane for strongly interacting quarks whose interactions are described by any reasonable gap equation, even if the diagrammatic content of the quark-gluon vertex is unknown. We locate a critical end point at (μE,TE)(1.0,0.9)Tc, where Tc is the critical temperature for chiral-symmetry restoration at μ=0, and find that a domain of phase coexistence opens at the critical end point whose area increases as a confinement length scale grows.

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  • Received 14 November 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.172301

© 2011 American Physical Society

Authors & Affiliations

Si-xue Qin1, Lei Chang1, Huan Chen2, Yu-xin Liu1,3, and Craig D. Roberts1,4

  • 1Department of Physics, Center for High Energy Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
  • 2Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 3Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China
  • 4Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

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Issue

Vol. 106, Iss. 17 — 29 April 2011

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