Charm semileptonic decays and|Vcs(d) from heavy clover quarks and 2+1 flavor asqtad staggered ensembles

Jon A. Bailey, D. Du, A. X. El-Khadra, Steven Gottlieb, R. D. Jain, A. S. Kronfeld, R. S. Van De Water, R. Zhou

Research output: Contribution to journalConference articlepeer-review

Abstract

By combining experimentally measured partial branching fractions for the semileptonic decays D→K and D→ with lattice calculations of the formfactors f D→K + (q2) and f D→ + (q2), one can extract the CKM matrix elements |Vcs| and |Vcd|. We are calculating the form factors by using Fermilab charm and asqtad staggered light and strange quarks on 2+1 flavor asqtad staggered ensembles generated by the MILC Collaboration. We vary the light valence quark masses from 0.4ms to 0.05ms (ms is the strange sea-quark mass), and the lattice spacings, from about 0.12 fm to about 0.045 fm. We extrapolate to the physical light-quark mass and the continuum limit using heavy-light meson staggered chiral perturbation theory about the SU(2) and SU(3) limits, compare the resulting (preliminary) form factor shapes with experiment, and discuss our errors.

Original languageEnglish (US)
Article number232
JournalProceedings of Science
VolumePart F130497
StatePublished - 2012
Event30th International Symposium on Lattice Field Theory, Lattice 2012 - Cairns, Australia
Duration: Jun 24 2012Jun 29 2012

ASJC Scopus subject areas

  • General

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