Pi0 -> Gamma Gamma in Dense QCD

Abstract

QCD superconductors in the color-flavor-locked (CFL) phase support light excitations (generalized pions) in the form of particle-particle or hole-hole excitations. We analyze the generalized process ${\tilde{\pi }}^0\to \tilde{\gamma }\tilde{\gamma }$ in the weak coupling limit and show that it is related to the recently suggested Wess-Zumino-Witten (WZW) term. In dense QCD, the radiative decay of the generalized pion is constrained by geometry and vanishes at large density.

7 pages, 1 figure

References in corpus (10)

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Cited by in corpus (12)

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• Neutrino Emission from Goldstone Modes in Dense Quark Matter
• Global Strings in High Density QCD
• Anomalous Chiral Superfluidity
• Chiral and Gravitational Anomalies on Fermi Surfaces
• Photon Self-Energy in a Color Superconductor
• Static properties of chiral models with SU(3) group structure
• Anomalous Chiral Fermi Surface
• Superconducting phase transition in the Nambu - Jona-Lasinio model
• Anomaly inflow on QCD axial domain-walls and vortices
• Neutral pion decay in dense skyrmion matter
• BCS vs Overhauser pairing in dense (2+1)d QCD