Journal article
B-s -> Kl nu decay from lattice QCD
Physical review. D, Vol.100(3), 034501
08/01/2019
DOI: 10.1103/PhysRevD.100.034501
Abstract
We use lattice QCD to calculate the form factors f(+) (q(2)) and f(0) (q(2)) for the semileptonic decay B-s -> Kl nu. Our calculation uses six MILC asqtad 2 + 1 flavor gauge-field ensembles with three lattice spacings. At the smallest and largest lattice spacing the light-quark sea mass is set to 1/10 the strange-quark mass. At the intermediate lattice spacing, we use four values for the light-quark sea mass ranging from 1/5 to 1/20 of the strange-quark mass. We use the asqtad improved staggered action for the light valence quarks, and the clover action with the Fermilab interpolation for the heavy valence bottom quark. We use SU(2) hard-kaon heavy-meson rooted staggered chiral perturbation theory to take the chiral-continuum limit. A functional z expansion is used to extend the form factors to the full kinematic range. We present predictions for the differential decay rate for both Bs -> K mu nu and B-s -> K tau nu. We also present results for the forward-backward asymmetry, the lepton polarization asymmetry, ratios of the scalar and vector form factors for the decays B-s -> Kl nu and B-s -> D(s)l nu. Our results, together with future experimental measurements, can be used to determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element vertical bar V-ub vertical bar.
Details
- Title: Subtitle
- B-s -> Kl nu decay from lattice QCD
- Creators
- A. Bazavov - Michigan State UniversityC. Bernard - Washington Univ, Dept Phys, St Louis, MO 63130 USAC. DeTar - University of UtahDaping Du - Syracuse UniversityA. X. El-Khadra - University of Illinois Urbana-ChampaignE. D. Freeland - Art Institute of ChicagoE. Gamiz - Universidad de GranadaZ. Gelzer - Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USASteven Gottlieb - Indiana UniversityU. M. Heller - Amer Phys Soc, Ridge, NY 11961 USAA. S. Kronfeld - Fermi National Accelerator LaboratoryJ. Laiho - Syracuse UniversityYuzhi Liu - Indiana UniversityP. B. Mackenzie - Fermi National Accelerator LaboratoryY. Meurice - Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USAE. T. Neil - Univ Colorado, Dept Phys, Boulder, CO 80309 USAJ. N. Simone - Fermi National Accelerator LaboratoryR. Sugar - Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USAD. Toussaint - University of ArizonaR. S. Van de Water - Fermi National Accelerator LaboratoryRan Zhou - Fermi National Accelerator LaboratoryMILC Collaborations
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Vol.100(3), 034501
- DOI
- 10.1103/PhysRevD.100.034501
- ISSN
- 2470-0010
- eISSN
- 2470-0029
- Publisher
- Amer Physical Soc
- Number of pages
- 27
- Grant note
- 291763 / European Union; European Commission CNS-0421498; CNS-0420873; CNS-0420985 / NSF MRI Grant; National Science Foundation (NSF); NSF - Office of the Director (OD) DE-SC0012704 / United States Department of Energy, Office of Science, Office of High Energy Physics; United States Department of Energy (DOE) 0832315 / Office of Advanced Cyberinfrastructure (OAC); National Science Foundation (NSF); NSF - Directorate for Computer & Information Science & Engineering (CISE) IBM Shared University Research (SUR) program; International Business Machines (IBM) DE-AC02-06CH11357 / DOE Office of Science User Facility; United States Department of Energy (DOE) 1615006 / Office of Advanced Cyberinfrastructure (OAC); Direct For Computer & Info Scie & Enginr; National Science Foundation (NSF); NSF - Directorate for Computer & Information Science & Engineering (CISE) FQM-101 / Junta de Andalucia(Spain); Junta de Andalucia DE-FG02-91ER40628; DE-FC02-12ER41879; DE-FG02-13ER42001; DE-SC0015655; DE-SC0010120; DE-FG02-91ER40661; DE-SC0010113; DE-SC0010005; DE-FG02-13ER41976 / U.S. Department of Energy; United States Department of Energy (DOE) DE-AC02-05CH11231 / Office of Science of the U.S. Department of Energy; United States Department of Energy (DOE) European Union's Marie Curie COFUND program 12-S-15 / URA Visiting Scholar Award OCI-0725070; ACI-1238993; 0832315; 1615006; ACI-1548562 [90] / National Science Foundation; National Science Foundation (NSF) State of Illinois FPA2013-47836-C-1-P; FPA2016-78220-C3-3-P / MINECO (Spain); Spanish Government German Excellence Initiative PHY14-14614; PHY17-19626; PHY14-17805 / U.S. National Science Foundation; National Science Foundation (NSF) 0832315 / Direct For Computer & Info Scie & Enginr; National Science Foundation (NSF); NSF - Directorate for Computer & Information Science & Engineering (CISE) NSF sponsorship of the National Center for Atmospheric Research; National Science Foundation (NSF); NSF - Directorate for Geosciences (GEO) Fermilab Distinguished Scholars program
- Language
- English
- Date published
- 08/01/2019
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429022702771
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