Electroweak physics for color superconductivity

Roberto Casalbuoni, Zhiyong Duan, and Francesco Sannino
Phys. Rev. D 63, 114026 – Published 9 May 2001
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Abstract

We construct the effective theories describing the electroweak interactions for the low-energy excitations associated with the color superconductive phases of QCD at high matter density. The main result for the 3 flavor case is that the quasiparticle Goldstone boson π0 decay into two physical massless photons is identical to the zero density case once we use the new Goldstone decay constant and the modified electric charge ẽ=ecosθ, with tanθ=2e/3gs and gs the strong coupling constant. For 2 flavors we find that the coupling of the quarks to the neutral vector boson Z0 is modified with respect to the zero density case. We finally point out possible applications of our result to the physics of compact objects.

  • Received 3 December 2000

DOI:https://doi.org/10.1103/PhysRevD.63.114026

©2001 American Physical Society

Authors & Affiliations

Roberto Casalbuoni*

  • Dipartimento di Fisica, Università di Firenze and INFN Sezione di Firenze, I-50125, Italy

Zhiyong Duan

  • Department of Physics, Yale University, New Haven, Connecticut 06520-8120

Francesco Sannino

  • NORDITA, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark

  • *Email address: roberto.casalbuoni@fi.infn.it
  • Email address: zhiyong.duan@yale.edu
  • Email address: francesco.sannino@nbi.dk

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Issue

Vol. 63, Iss. 11 — 1 June 2001

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