Rare $B$ decays using lattice QCD form factors
Year: 2015
Type: conference-paper
Abstract: In this write-up we review and update our recent lattice QCD calculation of B ! K⇤, Bs ! f , 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.
DOI: 10.22323/1.214.0372
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2962801555