On meson resonances and chiral symmetry Original Research Article

We study meson resonances with quantum numbers JP=1+ in terms of the chiral SU(3) Lagrangian. At leading order a parameter-free prediction is obtained for the scattering of Goldstone bosons off vector mesons with JP=1− once we insist on approximate crossing symmetry of the unitarized scattering amplitude. A resonance spectrum arises that is remarkably close to the empirical pattern. In particular, we find that the strangeness-zero resonances h1(1380), f1(1285) and b1(1235) are formed due to strong View the MathML source and View the MathML source channels. This leads to large coupling constants of those resonances to the latter states.