B-meson semileptonic decays with highly improved staggered quarks

Fermilab Lattice and MILC Collaborations

Research output: Contribution to journalConference articlepeer-review

Abstract

We present an update of the Fermilab Lattice and MILC Collaborations project to compute the form factors for semileptonic B(s)-meson decays. Our calculation uses the highly improved staggered quark (HISQ) action for sea and valence quarks, and ensembles with up, down, strange, and charm quarks in the sea. Using a highly improved action with the MILC Collaboration's gauge ensembles with lattice spacings down to a ≈ 0.03 fm, allows the heavy valence quarks to be treated with the same discretization as the light and strange quarks. This unified treatment of the valence quarks allows for absolutely normalized vector currents, bypassing the need for perturbative matching, which has been a source of uncertainty in previous calculations of B-meson decay form factors by our collaboration. All preliminary form-factor results are blinded.

Original languageEnglish (US)
Article number418
JournalProceedings of Science
Volume430
StatePublished - Apr 6 2023
Event39th International Symposium on Lattice Field Theory, LATTICE 2022 - Bonn, Germany
Duration: Aug 8 2022Aug 13 2022

ASJC Scopus subject areas

  • General

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