D-meson semileptonic form factors at zero momentum transfer in (2+1+1)-flavor lattice QCD

Thomas Primer, Doug Toussaint, Claude Bernard, Javad Komijani, Carleton DeTar, Aida El-Khadra, Elvira Gámiz, Andreas Kronfeld, James Simone, Ruth S. Van De Water

Research output: Contribution to journalConference articlepeer-review


We present a calculation of the D→kℓν and D→πℓν semileptonic form factors at q2 =0, which enable determinations of the CKM matrix elements /Vcs/ and /Vcd /, respectively. We use gaugefield configurations generated by the MILC collaboration with four flavors of highly-improved staggered (HISQ) quarks, analyzing several ensembles including those with physical pION masses and approximate lattice spacings ranging from 0.12 fm to 0.042 fm. We also use the HISQ action for the valence quarks. We employ twisted boundary conditions to calculate the form factors at zero momentum transfer directly. We use heavy-light-meson chiral perturbation theory modified for energetic pions and kaons, and supplemented by terms to describe the lattice-spacing dependence, to obtain preliminary results at the physical point and in the continuum limit.

Original languageEnglish (US)
Article number338
JournalProceedings of Science
StatePublished - 2015
Event33rd International Symposium on Lattice Field Theory, LATTICE 2015 - Kobe, Japan
Duration: Jul 14 2015Jul 18 2015

ASJC Scopus subject areas

  • General


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