Topological susceptibility and axion potential in two-flavor superconductive quark matter

Fabrizio Murgana, David E. Alvarez Castillo, Ana G. Grunfeld +1

We study the potential of the axion, $a$, of Quantum Chromodynamics, in the two-flavor color superconducting phase of cold and dense quark matter. We adopt a Nambu-Jona-Lasinio-lik…