When the transition temperature in color superconductors is not like in BCS theory
Sep, 2002
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Abstract:
We study color superconductivity with and 3 massless flavors of quarks. We present a general formalism to derive and solve the gap equations for condensation in the even-parity channel. This formalism shows that the leading-order contribution to the gap equation is unique for all color superconductors studied here, and that differences arise solely at the subleading order. We discuss a simple method to compute subleading contributions from the integration over gluon momenta in the gap equation. Subleading contributions enter the prefactor of the color-superconducting gap parameter. In the case of color-flavor and color-spin locking we identify further corrections to this prefactor arising from the two-gap structure of the quasiparticle excitations. Computing the transition temperature, , where the color-superconducting condensate melts, we find that these contributions lead to deviations from the BCS behavior , where is the magnitude of the zero-temperature gap at the Fermi surface.- 24.85.+p
- 12.38.Mh
- quantum chromodynamics
- color: superconductivity
- quark: massless
- flavor: 1-3
- critical phenomena
- temperature
- fermion: propagator
- renormalization
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