出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The experimentally measured rates of the semileptonic decays K →p ln and D → K(p )ln can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |Vus| and |Vcs(d)|. We report on the status of form factor calculations with Fermilab charm quarks and staggered light quarks on the 2+1 flavor asqtad staggeredMILC ensembles. Analysis of data for the D→p ln form factor provides a nontrivial test of our methods via comparison with CLEO data. We discuss the use of HISQ valence quarks to calculate the K →p ln form factor f Kp + (0) and describe tests of our method.
