Kaon semileptonic decays with Nf = 2+1+1 HISQ fermions and physical light-quark masses

E. Gámiz, A. Bazavov, C. Bernard, C. DeTar, D. Du, A. X. El-Khadra, E. D. Freeland, Steven Gottlieb, U. M. Heller, J. Komijani, A. S. Kronfeld, John W Laiho, P. B. Mackenzie, E. T. Neil, T. Primer, J. N. Simone, R. Sugar, D. Toussaint, R. S. Van De Water, Ran Zhou

Research output: Contribution to journalArticle

Abstract

We discuss the reduction of errors in the calculation of the form factor f + (0) with HISQ fermions on the Nf = 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 |Vus|.

Original languageEnglish (US)
JournalProceedings of Science
VolumePart F128557
StatePublished - 2016

ASJC Scopus subject areas

  • General

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    Gámiz, E., Bazavov, A., Bernard, C., DeTar, C., Du, D., El-Khadra, A. X., Freeland, E. D., Gottlieb, S., Heller, U. M., Komijani, J., Kronfeld, A. S., Laiho, J. W., Mackenzie, P. B., Neil, E. T., Primer, T., Simone, J. N., Sugar, R., Toussaint, D., Van De Water, R. S., & Zhou, R. (2016). Kaon semileptonic decays with Nf = 2+1+1 HISQ fermions and physical light-quark masses. Proceedings of Science, Part F128557.