Thermal phase transitions and gapless quark spectra in quark matter at high density
Nov, 2004
15 pages
Published in:
- Phys.Rev.D 71 (2005) 054003
e-Print:
- hep-ph/0411356 [hep-ph]
Report number:
- RIKEN-TH-36
View in:
Citations per year
Abstract:
Thermal color superconducting phase transitions in three-flavor quark matter at high baryon density are investigated in the Ginzburg-Landau (GL) approach. We constructed the GL potential near the boundary with a normal phase by taking into account nonzero quark masses, electric charge neutrality, and color charge neutrality. We found that the density of states averaged over paired quarks plays a crucial role in determining the phases near the boundary. By performing a weak coupling calculation of the parameters characterizing the GL potential terms of second order in the pairing gap, we show that three successive second-order phase transitions take place as the temperature increases: a modified color-flavor locked phase (ud, ds, and us pairings) -> a ``dSC'' phase (ud and ds pairings) -> an isoscalar pairing phase (ud pairing) -> a normal phase (no pairing). The Meissner masses of the gluons and the number of gapless quark modes are also studied analytically in each of these phases.- 26.60.+c
- 12.38.Mh
- quark: matter
- flavor: 3
- baryon: density
- superconductivity: color
- critical phenomena
- Landau-Ginzburg model
- approximation: weak coupling
- gluon: mass
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