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arXiv · hep-ph/0007034

Pi0 -> Gamma Gamma in Dense QCD

Maciej A. Nowak·Mannque Rho·Andreas Wirzba·Ismail Zahed
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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 $\tildeπ^0\to\tildeγ\tildeγ$ 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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Maciej A. Nowak, Mannque Rho, Andreas Wirzba, Ismail Zahed. 2000-07-04. Pi0 -> Gamma Gamma in Dense QCD. https://doi.org/10.1016/s0370-2693(00)01303-4

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