Investigation of a0-f0 mixing

Details Investigation of a0-f0 mixing Investigation of a0-f0 mixing

2007-07-02

arxiv.org/abs/0707.0262v2

Phys.Rev.D76:074028,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 9 figures; discussion extended, title changed, version published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.76.074028

We investigate the isospin-violating mixing of the light scalar mesons a0(980) and f0(980) within the unitarized chiral approach. Isospin-violating effects are considered to leading order in the quark mass differences and electromagnetism. In this approach both mesons are generated through meson-meson dynamics. Our results provide a description of the mixing phenomenon within a framework consistent with chiral symmetry and unitarity, where these resonances are not predominantly q q-bar states. Amongst the possible experimental signals, we discuss observable consequences for the reaction J/Psi -> phi pi0 eta in detail. In particular we demonstrate that the effect of a0-f0 mixing is by far the most important isospin-breaking effect in the resonance region and can indeed be extracted from experiment.

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