TY - JOUR

T1 - Phase diagram of two-color lattice QCD in the chiral limit

AU - Chandrasekharan, Shailesh

AU - Jiang, Fu Jiun

N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2006

Y1 - 2006

N2 - We study thermodynamics of strongly coupled lattice QCD with two colors of massless staggered fermions as a function of the baryon chemical potential μ in 3+1 dimensions using a new cluster algorithm. We find evidence that the model undergoes a weak first order phase transition at μ=0 which becomes second order at a finite μ. Symmetry considerations suggest that the universality class of these phase transitions should be governed by a O(N)×O(2) field theory with collinear order, with N=3 at μ=0 and N=2 at μ≠0. The universality class of the second order phase transition at μ≠0 appears to be governed by the decoupled XY fixed point present in the O(2)×O(2) field theory. Finally we show that the quantum (T=0) phase transition as a function of μ is a second order mean field transition.

AB - We study thermodynamics of strongly coupled lattice QCD with two colors of massless staggered fermions as a function of the baryon chemical potential μ in 3+1 dimensions using a new cluster algorithm. We find evidence that the model undergoes a weak first order phase transition at μ=0 which becomes second order at a finite μ. Symmetry considerations suggest that the universality class of these phase transitions should be governed by a O(N)×O(2) field theory with collinear order, with N=3 at μ=0 and N=2 at μ≠0. The universality class of the second order phase transition at μ≠0 appears to be governed by the decoupled XY fixed point present in the O(2)×O(2) field theory. Finally we show that the quantum (T=0) phase transition as a function of μ is a second order mean field transition.

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U2 - 10.1103/PhysRevD.74.014506

DO - 10.1103/PhysRevD.74.014506

M3 - Article

AN - SCOPUS:33745785216

VL - 74

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 1

M1 - 014506

ER -