Journal article
B_s->D_s/B->D Semileptonic Form-Factor Ratios and Their Application to BR(B^0_s->μ + μ −)
Physical review. D, Particles, fields, gravitation, and cosmology, Vol.85(11), 114502
02/28/2012
DOI: 10.1103/PhysRevD.85.114502
Abstract
We calculate form-factor ratios between the semileptonic decays ¯¯¯B0→D+ℓ−¯ν and ¯¯¯B0s→D+sℓ−¯ν with lattice QCD. These ratios are a key theoretical input in a new strategy to determine the fragmentation fractions of neutral B decays, which are needed for measurements of BR(B0s→μ+μ−). We use the MILC ensembles of gauge configurations with 2+1 flavors of sea-quarks at two s of approximately 0.12 fm and 0.09 fm. We use the model-independent z parametrization to extrapolate our simulation results at small recoil toward maximum recoil. Our results for the form-factor ratios are f(s)0(M2π)/f(d)0(M2K)=1.046(44)stat(15)syst and f(s)0(M2π)/f(d)0(M2π)=1.054(47)stat(17)syst. In contrast to a QCD sum-rule calculation, no significant departure from U-spin (d↔s) symmetry is observed.
Details
- Title: Subtitle
- B_s->D_s/B->D Semileptonic Form-Factor Ratios and Their Application to BR(B^0_s->μ + μ −)
- Creators
- Jon A Bailey - Seoul National UniversityA Bazavov - Brookhaven National LaboratoryC Bernard - Washington University in St. LouisC. M Bouchard - Fermi National Accelerator LaboratoryC DeTar - University of UtahDaping Du - University of IowaA. X El-KhadraJ Foley - University of UtahE. D Freeland - Benedictine UniversityE Gamiz - Universidad de GranadaSteven Gottlieb - Indiana UniversityU. M Heller - American Physical SocietyJongjeong Kim - University of ArizonaA. S Kronfeld - Fermi National Accelerator LaboratoryJ Laiho - University of GlasgowL Levkova - University of UtahP. B Mackenzie - Fermi National Accelerator LaboratoryY Meurice - University of IowaE Neil - Fermi National Accelerator LaboratoryM. B Oktay - University of UtahSi-Wei Qiu - University of UtahJ. N Simone - Fermi National Accelerator LaboratoryR Sugar - University of California, Santa BarbaraD Toussaint - University of ArizonaR. S Van de Water - Brookhaven National LaboratoryRan Zhou - Indiana University
- Resource Type
- Journal article
- Publication Details
- Physical review. D, Particles, fields, gravitation, and cosmology, Vol.85(11), 114502
- DOI
- 10.1103/PhysRevD.85.114502
- ISSN
- 1550-7998
- eISSN
- 1550-2368
- Publisher
- American Physical Society
- Grant note
- DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation
- Language
- English
- Date published
- 02/28/2012
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199743002771
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