Kaon semileptonic form factors in QCD with exact chiral symmetry

Details Kaon semileptonic form factors in QCD with exact chiral symmetry Kaon semileptonic form factors in QCD with exact chiral symmetry

2011-12-22

arxiv.org/abs/1112.5259v1

PoS (Lattice 2011) 284

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, talk presented at the XXIX International Symposium on Lattice Field Theory (Lattice 2011), Squaw Valley, Lake Tahoe,

Scientific paper

We report on our calculation of the kaon semileptonic form factors in Nf=2+1 lattice QCD. Chiral symmetry is exactly preserved by using the overlap quark action for a straightforward comparison with chiral perturbation theory (ChPT). We simulate three pion masses down to 290 MeV at a single lattice spacing of 0.11 fm and at a strange quark mass very close to its physical value. The form factors near zero momentum transfer are precisely calculated by using the all-to-all propagator and twisted boundary conditions. We compare the normalizations and slopes of the form factors with ChPT and experiments.

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