Abstract
We present updates for our nonperturbative lattice QCD calculations to determine semileptonic form factors for exclusive B → π`ν, B → D`ν, Bs → K`ν, and Bs → Ds`ν decays. Our calculation is based on RBC-UKQCD's set of 2 + 1-dynamical-flavor gauge field ensembles. In the valence sector we use domain wall fermions for up/down, strange and charm quarks, whereas bottom quarks are simulated with the relativistic heavy quark action. The continuum limit is based on three lattice spacings. Using kinematical z expansions we aim to obtain form factors over the full q2 range. These form factors are the basis for predicting ratios addressing lepton flavor universality or, when combined with experimental results, to obtain CKM matrix elements |Vub| and |Vcb|.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 184 |
| Tidsskrift | Proceedings of Science |
| Vol/bind | 363 |
| Antal sider | 14 |
| ISSN | 1824-8039 |
| DOI | |
| Status | Udgivet - aug. 2020 |
| Begivenhed | 37th International Symposium on Lattice Field Theory, LATTICE 2019 - Wuhan, Kina Varighed: 16. jun. 2019 → 22. jun. 2019 |
Konference
| Konference | 37th International Symposium on Lattice Field Theory, LATTICE 2019 |
|---|---|
| Land/Område | Kina |
| By | Wuhan |
| Periode | 16/06/2019 → 22/06/2019 |
Bibliografisk note
Funding Information:We thank our RBC and UKQCD collaborators for helpful discussions and suggestions, and P. Gambino for discussion on unitarity-constrained fits. Computations were performed on resources provided by the USQCD Collaboration, funded by the Office of Science of the U.S. Department of Energy, on the ARCHER UK National Supercomputing Service (http://www.archer.ac.uk), as well as on computers at Columbia University and Brookhaven National Laboratory. We used gauge field configurations generated on the DiRAC Blue Gene Q system at the University of Edinburgh, part of the DiRAC Facility, funded by BIS National E-infrastructure grant ST/K000411/1 and STFC grants ST/H008845/1, ST/K005804/1 and ST/K005790/1. This project has received funding from STFC grants ST/L000458/1 and ST/P000711/1. RH was supported by the DISCnet Centre for Doctoral Training (STFC grant ST/P006760/1). AS was supported in part by US DOE contract DE–SC0012704. OW acknowledges support from DOE grant DE–SC0010005. No new experimental data was generated.
Publisher Copyright:
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