出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：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 jVusj. 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.
