QCD vacuum replicas are metastable

Abstract

We study the meson spectra in the excited QCD vacua, denominated replicas. We find all mesons have real masses, with no tachyons, thus showing the QCD replicas are indeed metastable.

Comments: 8 pages, 8 figures, contribution to the XVth Quark Confinement and the Hadron Spectrum Conference, Aug 2022 University of Stavanger