Nonperturbative calculations of form factors for exclusive semileptonic B(s) decays

Jonathan M. Flynn, Ryan C. Hill, Andreas Jüttner, Amarjit Soni, J. Tobias Tsang, Oliver Witzel*

*Corresponding author for this work

Research output: Contribution to journalConference articleResearchpeer-review

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Abstract

Precise theoretical predictions derived from the Standard Model are a key ingredient in searches for new physics in the flavor sector. The large mass and long lifetime of the bquark make processes involving b quarks of particular interest. We use lattice simulations to perform nonperturbative QCD calculations for semileptonic B(s) decays. We present results from our determinations of Bs ? Dsl? and Bs ? Kl? semileptonic form factors and provide an outlook for our B ? pl? calculation. In addition we discuss the determination of R-ratios testing lepton-flavor universality and suggest use of an improved ratio. Our calculations are based on the set of 2+1 flavor domain wall Iwasaki gauge field configurations generated by the RBC-UKQCD collaboration featuring three lattice spacings of 1/a = 1.78, 2.38, and 2.79 GeV. Heavy b-quarks are simulated using the relativistic heavy quark action.

Original languageEnglish
Article number436
JournalProceedings of Science
Volume390
Number of pages6
ISSN1824-8039
DOIs
Publication statusPublished - Apr 2021
Event40th International Conference on High Energy Physics, ICHEP 2020 - Virtual, Prague, Czech Republic
Duration: 28. Jul 20206. Aug 2020

Conference

Conference40th International Conference on High Energy Physics, ICHEP 2020
Country/TerritoryCzech Republic
CityVirtual, Prague
Period28/07/202006/08/2020

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