Kaon semileptonic decay form factors from N_f = 2 non-perturbatively O(a)-improved Wilson fermions

Details Kaon semileptonic decay form factors from N_f = 2 non-perturbatively O(a)-improved Wilson fermions Kaon semileptonic decay form factors from N_f = 2 non-perturbatively O(a)-improved Wilson fermions

2007-10-10

arxiv.org/abs/0710.2100v2

PoSLAT2007:364,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 3 figures. Presented by S.M. Morozov at The XXV International Symposium on Lattice Field Theory, July 30 - August 4 2

Scientific paper

We present first results from the QCDSF collaboration for the kaon semileptonic decay form factors at zero momentum transfer, using two flavours of non-perturbatively O(a)-improved Wilson quarks. A lattice determination of these form factors is of particular interest to improve the accuracy on the CKM matrix element |V_us|. Calculations are performed on lattices with lattice spacing of about 0.08 fm with different values of light and strange quark masses, which allows us to extrapolate to chiral limit. Employing double ratio techniques, we are able to get small statistical errors.

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