Kaon semileptonic decay (K_{l3}) form factor in the nonlocal chiral quark model

Details Kaon semileptonic decay (K_{l3}) form factor in the nonlocal chiral quark model Kaon semileptonic decay (K_{l3}) form factor in the nonlocal chiral quark model

2007-05-17

arxiv.org/abs/0705.2493v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the international workshop, Hadronic and Nuclear Physics (HNP07) on "Quarks in hadrons, nuclei, and matter", Bus

Scientific paper

We investigate the kaon semileptonic decay (K_{l3}) form factors within the framework of the nonlocal chiral quark model from the instanton vacuum, taking into account the effects of flavor SU(3) symmetry breaking. All theoretical calculations are carried out without any adjustable parameter. We also show that the present results satisfy the Callan-Treiman low-energy theorem as well as the Ademollo-Gatto theorem. It turns out that the effects of flavor SU(3) symmetry breaking are essential in reproducing the kaon semileptonic form factors. The present results are in a good agreement with experiments, and are compatible with other model calculations.

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