Pi0 -> Gamma Gamma in Dense QCD

Details Pi0 -> Gamma Gamma in Dense QCD Pi0 -> Gamma Gamma in Dense QCD

2000-07-04

arxiv.org/abs/hep-ph/0007034v1

Phys.Lett. B497 (2001) 85-90

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 1 figure

Scientific paper

10.1016/S0370-2693(00)01303-4

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.

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