Dispersion Laws for In-medium Fermions and Gluons in the CFL Phase of QCD

Details Dispersion Laws for In-medium Fermions and Gluons in the CFL Phase of QCD Dispersion Laws for In-medium Fermions and Gluons in the CFL Phase of QCD

2000-10-27

arxiv.org/abs/hep-ph/0010321v4

Phys.Lett. B498 (2001) 179-188; Erratum-ibid. B517 (2001) 483

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, LaTex, 2 figures. Version published in Phys. Lett. B with an arithmetic misprint corrected in eq. (62) (and as a con

Scientific paper

10.1016/S0370-2693(00)01390-3

We evaluate several quantities appearing in the effective lagrangian for the color-flavor locked phase of high density QCD using a formalism which exploits the approximate decoupling of fermions with energy negative with respect to the Fermi energy. The effective theory is essentially two-dimensional and exhibits a Fermi velocity superselection rule, similar to the one found in the Heavy Quark Effective Theory. Within the formalism we reproduce, using gradient expansion, the results for the effective parameters of the Nambu-Goldstone bosons. We also determine the dispersion laws for the gluons. By coupling the theory to fermions and integrating over the two-dimensional degrees of freedom we obtain the effective description of in-medium fermions.

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