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arXiv · 0707.0262

Investigation of a0-f0 mixing

Christoph Hanhart·Bastian Kubis·Jose R. Pelaez
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Abstract

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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Christoph Hanhart, Bastian Kubis, Jose R. Pelaez. 2007-10-24. Investigation of a0-f0 mixing. https://doi.org/10.1103/physrevd.76.074028

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