Bs → Kℓν form factors with 2+1 flavors

Yuzhi Liu, Jon A. Bailey, A. Bazavov, C. Bernard, C. M. Bouchard, C. DeTar, Daping Du, A. X. El-Khadra, E. D. Freeland, E. Gámiz, Z. Gelzer, Steven Gottlieb, U. M. Heller, A. S. Kronfeld, J. Laiho, P. B. Mackenzie, Y. Meurice, E. T. Neil, J. N. Simone, R. SugarD. Toussaint, R. S. van de Water, Ran Zhou

Research output: Contribution to journalArticlepeer-review


Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors f0 and f+ for the semileptonic Bs → Kℓν decay. A total of six ensembles with lattice spacing from ≈ 0.12 to 0.06 fm are being used. At the coarsest and finest lattice spacings, the light quark mass ml is one-tenth the strange quark mass ms. At the intermediate lattice spacing, the ratio ml/ms ranges from 0.05 to 0.2. The valence b quark is treated using the Sheikholeslami-Wohlert Wilson-clover action with the Fermilab interpretation. The other valence quarks use the asqtad action. When combined with (future) measurements from the LHCb and Belle II experiments, these calculations will provide an alternate determination of the CKM matrix element |Vub|.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Nov 21 2017

ASJC Scopus subject areas

  • General

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