Scalar Mesons and Chiral Dynamics

Details Scalar Mesons and Chiral Dynamics Scalar Mesons and Chiral Dynamics

2002-04-15

arxiv.org/abs/hep-ph/0204170v1

AIP Conf.Proc.623:131-138,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, invited talk to the VIII Mexican Workshop on Particles and Fields, Zacatecas, Mexico, Nov. 14-20, 2001

Scientific paper

10.1063/1.1489741

We discuss scalar mesons properties on the light of chiral dynamics. Considering them as the chiral partners of pseudo-scalar mesons we propose an explanation to their unusual properties based on non-trivial vacuum effects coming from the interplay between spontaneous breaking of chiral symmetry and the violation of $U_A(1)$ symmetry by instantons. Including vector mesons as external sources we work out predictions for radiative decays of vector mesons and compare some of them with recent experimental results from high luminosity $\Phi$ factories.

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