Chiral vacuum alignment in dense QCD

DOI10.1016/S0370-2693(01)00232-5zbMATH Open0977.81519arXivhep-ph/0005312OpenAlexW2088779048MaRDI QIDQ5933195

Publication date: 7 June 2001

Published in: Physics Letters B (Search for Journal in Brave)

Abstract: We discuss an interesting possibility of nontrivial, quark-mass induced chiral vacuum alignment in color-flavor locking phase of cold, dense QCD. With the simplifying assumption that the gaps for quarks are identical to those of antiquarks and the light quark masses are given by

m_{u} = m_{d}

and

m_{s} / m_{d} = 15

, we find the true chiral vacuum can align only to one of the discrete number of directions in the continuum of chiral vacua. The alignment depends on the size of the diquark condensates, and the vacuum transitions between the discrete vacua caused by the evolution of the diquark condensates can be first order phase transition with vanishing or nonvanishing latent heat, depending on the vacua involved. It is also shown that as

m u o i n f t y

, where

m u

is the baryon chemical potential, parity is spontaneously broken through the vacuum alignment.

Full work available at URL: https://arxiv.org/abs/hep-ph/0005312

zbMATH Keywords

color-flavor locking phase diquark condensate size dependence first order phase transition

Mathematics Subject Classification ID

Strong interaction, including quantum chromodynamics (81V05)

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