Mixing and $m_q$ dependence of axial vector mesons in the Coulomb gauge QCD model

Abstract

We discuss pure $q\bar{q}$ axial-vector mesons in the Tamm-Dancoff approximation of the Coulomb-gauge QCD model from NCSU. While recent studies have put emphasis in configuration mixing with open meson-meson channels, we here concentrate on the simpler closed-channel problem and follow the $1^{+}$ mixing through a wide range of quark masses. We also examine their radial excitations and discuss with them the concept of insensitivity to chiral symmetry breaking.

arXiv comment23 pages, 7 figures; version published in Phys. Rev. D

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