Kaon semileptonic form factors in QCD with exact chiral symmetry
Abstract
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.
- Publication:
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arXiv e-prints
- Pub Date:
- December 2011
- DOI:
- arXiv:
- arXiv:1112.5259
- Bibcode:
- 2011arXiv1112.5259J
- Keywords:
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- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology
- E-Print:
- 7 pages, talk presented at the XXIX International Symposium on Lattice Field Theory (Lattice 2011), Squaw Valley, Lake Tahoe, California, July 10-16, 2011