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

Shailesh Chandrasekharan, Fu Jiun Jiang

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41 引文 斯高帕斯(Scopus)

摘要

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.

原文英語
文章編號014506
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
74
發行號1
DOIs
出版狀態已發佈 - 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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