Rare B decays using lattice QCD form factors

R. R. Horgan, Z. Liu, S. Meinel, M. Wingate

Research output: Contribution to journalConference articlepeer-review

22 Scopus citations


In this write-up we review and update our recent lattice QCD calculation of B→ K∗, Bs→ Ø, and Bs→ K∗ form factors [1]. These unquenched calculations, performed in the low-recoil kinematic regime, provide a significant improvement over the use of extrapolated light cone sum rule results. The fits presented here include further kinematic constraints and estimates of additional correlations between the different form factor shape parameters. We use these form factors along with Standard Model determinations of Wilson coefficients to give Standard Model predictions for several observables [2]. The modest improvements to the form factor fits lead to improved determinations of FL, the fraction of longitudinally polarized vector mesons, but have little effect on most other observables.

Original languageEnglish (US)
Article number372
JournalProceedings of Science
VolumePart F130500
StatePublished - 2014
Event32nd International Symposium on Lattice Field Theory, LATTICE 2014 - New York, United States
Duration: Jun 23 2014Jun 28 2014

ASJC Scopus subject areas

  • General


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