Kaon semileptonic decays with $N_f=2+1+1$ HISQ fermions and physical light quark masses

Elvira Gamiz, Alexei Bazavov, Claude Bernard, Carleton DeTar, Daping Du, Aida X El-Khadra, Elizabeth Freeland, Steven Gottlieb, Urs M. Heller, Javad Komijani, Andreas Kronfeld, John Laiho (+8 others)
2016 Proceedings of 34th annual International Symposium on Lattice Field Theory — PoS(LATTICE2016)   unpublished
We discuss the reduction of errors in the calculation of the form factor f Kπ + (0) with HISQ fermions on the N f = 2 + 1 + 1 MILC configurations from increased statistics on some key ensembles, new data on ensembles with lattice spacings down to 0.042 fm and the study of finite-volume effects within staggered ChPT. We also study the implications for the unitarity of the CKM matrix in the first row and for current tensions with leptonic determinations of |V us |. 34th annual International
more » ... International Symposium on Lattice Field Theory
doi:10.22323/1.256.0286 fatcat:iqrh3kuuqfhhjmi5wiuhwhb45m