Anisotropy parameters for the effective description of crystalline color superconductors

R. Casalbuoni, R. Gatto, M. Mannarelli, and G. Nardulli
Phys. Rev. D 66, 014006 – Published 16 July 2002
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Abstract

In the high density low temperature limit, quantum chromodynamics (QCD) exhibits a transition to a phase characterized by color superconductivity and by energy gaps in the fermion spectra. Under specific circumstances the gap parameter has a crystalline pattern, breaking translational and rotational invariance. The corresponding phase is the the crystalline color superconductive phase [or Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) phase]. In the effective theory the fermions couple to the phonon arising from the breaking of rotation and translation invariance. We compute for the single-plane-wave condensate ansatz the parameters of the low energy effective Lagrangian describing the motion of the free phonon in the high density medium and derive the phonon dispersion law.

  • Received 10 January 2002

DOI:https://doi.org/10.1103/PhysRevD.66.014006

©2002 American Physical Society

Authors & Affiliations

R. Casalbuoni1,2, R. Gatto3, M. Mannarelli4,5, and G. Nardulli4,5

  • 1Dipartimento di Fisica, Università di Firenze, I-50125 Firenze, Italy
  • 2INFN, Sezione di Firenze, I-50125 Firenze, Italy
  • 3Départ. de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland
  • 4Dipartimento di Fisica, Università di Bari, I-70124 Bari, Italy
  • 5INFN, Sezione di Bari, I-70124 Bari, Italy

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Vol. 66, Iss. 1 — 1 July 2002

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