2021-11-01

UTAPwiki/セミナー/初期宇宙・相対論速報

Title: Universality class and the chiral phase transition in QCD †

Speaker: Kohei Fujikura †

Landau-Ginzburg-Wilson (LGW) theory, based on the argument of universality, is a powerful effective theory that describes the dynamics of various phase transitions [1,2]. Pisarski and Wilczek constructed the LGW Hamiltonian of the QCD chiral phase transition and analyze the dynamics of the phase transition at one-loop order. They concluded that the phase transition is of (fluctuation-induced) first order for two or more massless quarks when U(1)_A is fully recovered during the phase transition [3]. In this talk, I will review the argument of universality and its application to QCD (chiral) phase transition.

References:
[1] K.G.Wilson and M. E. Fisher Critical Exponents in 3.99 Dimensions, Phys. Rev. Lett. 28, 240
[2] M. E. Fisher, The renormalization group in the theory of critical behavior, Rev. Mod. Phys. 47, 543 (1975).
[3] R. D. Pisarski and F. Wilczek, “Remarks on the chiral phase transition in chromodynamics,”