CFL phase of high density QCD at non zero strange quark mass

Jul, 2004
16 pages
Published in:
  • Phys.Rev.D 71 (2005) 014011
e-Print:
Report number:
  • INT-PUB-04-19,
  • UW-PT-04-10

Citations per year

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Abstract:
We compute free energy of quark matter at asymptotically high baryon number density in the presence of non zero strange quark mass including dynamics of pseudo Nambu-Goldstone bosons due to chiral symmetry breaking, extending previously existing analysis based on perturbative expansion in ms2/4μΔ.m_s^2/4\mu\Delta. We demonstrate that the CFLK0K^0 state has lower free energy than the symmetric CFL state for 0<ms2/4μΔ<2/30<m_s^2/4\mu\Delta<2/3. We also calculate the spectrum of the fermionic quasiparticle excitations about the kaon condensed ground state in the regime ms2/4μΔ1m_s^2/4\mu\Delta \sim 1 and find that (ms2/4μΔ)crit=2/3(m_s^2/4\mu\Delta)_{crit}=2/3 for the CFL-gCFL phase transition, the leading order result reported in [1], is not modified.
  • 12.38.Aw
  • quantum chromodynamics
  • quark: matter
  • energy
  • baryon number: density
  • mass: strangeness
  • symmetry breaking: chiral
  • Goldstone particle
  • color flavor locked phase
  • K0: ground state