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Generalized Ward identity and gauge invariance of the color-superconducting gap

De-fu Hou, Qun Wang, and Dirk H. Rischke
Phys. Rev. D 69, 071501(R) – Published 27 April 2004
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Abstract

We derive a generalized Ward identity for color-superconducting quark matter via the functional integral approach. The identity implies the gauge independence of the color-superconducting gap parameter on the quasiparticle mass shell to subleading order in the covariant gauge.

  • Received 22 January 2004

DOI:https://doi.org/10.1103/PhysRevD.69.071501

©2004 American Physical Society

Authors & Affiliations

De-fu Hou*

  • Institut für Theoretische Physik, J.W. Goethe-Universität, D-60054 Frankfurt/Main, Germany
  • Institute of Particle Physics, Huazhong Normal University, Wuhan, 430079, People’s Republic of China

Qun Wang†

  • Institut für Theoretische Physik, J.W. Goethe-Universität, D-60054 Frankfurt/Main, Germany
  • Physics Department, Shandong University, Jinan, Shandong, 250100, People’s Republic of China

Dirk H. Rischke‡

  • Institut für Theoretische Physik, J.W. Goethe-Universität, D-60054 Frankfurt/Main, Germany

  • *Electronic address: hou@th.physik.uni-frankfurt.de
  • †Electronic address: qwang@th.physik.uni-frankfurt.de
  • ‡Electronic address: drischke@th.physik.uni-frankfurt.de

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Vol. 69, Iss. 7 — 1 April 2004

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