Chiral Symmetry and Hyperfine Quark-Antiquark Splittings
arXiv:hep-ph/0311246 · doi:10.1140/epjcd/s2003-03-510-9
Abstract
We briefly review theoretical calculations for the pseudoscalar-vector meson hyperfine splitting with no open flavor and also report a many body field theoretical effort to assess the impact of chiral symmetry in the choice of effective potentials for relativistic quark models. Our calculations predict the missing eta_b meson to have mass near 9400 $MeV$. The radial excitation $η_c(2S)$ is in agreement with the measurements of the BELLE and most recently BABAR collaborations.
European HEP conference proceedings (Aachen, July 2003). A few typographical errors corrected