Eur Phys J C (2004) 33: s521-s523
https://doi.org/10.1140/epjcd/s2003-03-510-9

PS05 Hadronic Physics

Chiral symmetry and hyperfine splittings

¹ Depto. de Física Teórica I, Univ. Complutense, 28040 Madrid, Spain
² Department of Physics, North Carolina State University, Raleigh NC 27695-8202, USA
³ Department of Physics and Nuclear Theory Center, Indiana University Bloomington, IN 47405-4202, USA
⁴ Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260 and Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606, USA

Received: 31 October 2003
Accepted: 14 November 2003
Published online: 3 December 2003

Abstract

We 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 η _b meson to have mass near 9400 MeV.

PACS: 11.30.Rd – 12.38.Lg – 12.39.Ki – 12.40Yx