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.
|Journal||Proceedings of Science|
|Number of pages||6|
|Publication status||Published - Apr 2021|
|Event||40th International Conference on High Energy Physics, ICHEP 2020 - Virtual, Prague, Czech Republic|
Duration: 28. Jul 2020 → 6. Aug 2020
|Conference||40th International Conference on High Energy Physics, ICHEP 2020|
|Period||28/07/2020 → 06/08/2020|
Bibliographical notePublisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).