EPJ Web of Conferences (Jan 2018)

Semileptonic B-meson decays to light pseudoscalar mesons on the HISQ ensembles

  • Gelzer Zechariah,
  • Bernard C.,
  • Tar C. De,
  • El-Khadra AX,
  • Gámiz E.,
  • Gottlieb Steven,
  • Kronfeld Andreas S.,
  • Liu Yuzhi,
  • Meurice Y.,
  • Simone J.N.,
  • Toussaint D.,
  • Water R.S. Van de,
  • Zhou R.

DOI
https://doi.org/10.1051/epjconf/201817513024
Journal volume & issue
Vol. 175
p. 13024

Abstract

Read online

We report the status of an ongoing lattice-QCD calculation of form factors for exclusive semileptonic decays of B mesons with both charged currents (B → πlv, Bs → Klv) and neutral currents (B → πl+l-, B → Kl+l-). The results are important for constraining or revealing physics beyond the Standard Model. This work uses MILC’s (2+1 + 1)-flavor ensembles with the HISQ action for the sea and light valence quarks and the clover action in the Fermilab interpretation for the b quark. Simulations are carried out at three lattice spacings down to 0.088 fm, with both physical and unphysical sea-quark masses. We present preliminary results for correlation-function fits.