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dc.contributor.authorBailey, J. A.
dc.contributor.authorGámiz Sánchez, María Elvira
dc.identifier.citationLattice, F., Collaborations, M. I. L. C., Bailey, J. A., Bazavov, A., Bernard, C., Bouchard, C. M., ... & Freeland, E. D. (2015). B→ D ℓ ν form factors at nonzero recoil and| V c b| from 2+ 1-flavor lattice QCD. Physical Review D, 92(3), 034506. []es_ES
dc.descriptionComputations for this work were carried out with resources provided by the USQCD Collaboration, the National Energy Research Scientific Computing Center, and the Argonne Leadership Computing Facility, which is funded by the Office of Science of the U.S. Department of Energy; and with resources provided by the National Institute for Computational Science and the Texas Advanced Computing Center, which are funded through the National Science Foundation's Teragrid/XSEDE Program. This work was supported in part by the U.S. Department of Energy under Grants No. DE-FG02-91ER40628 (C. B., J. K.), No. DE-FC02-06ER41446 (C. D., J. F., L. L.), No. DE-SC0010120 (S. G.), No. DE-FG02-91ER40661 (S. G., R. Z.), No. DE-FG02-13ER42001 (D. D., A. X. K.), No. DE-FG02-ER41976 (D. T.); by the U.S. National Science Foundation under Grants No. PHY10-67881 and No. PHY10-034278 (C. D.), No. PHY14-17805 (J. L., D. D.), No. PHY09-03571 (S.-W.Q.), and No. PHY13-16748 (R. S.); by the URA Visiting Scholars' program (C. M. B., D. D., A. X. K.); by the MICINN (Spain) under Grant No. FPA2010-16696 and Ramon y Cajal program (E. G.); by the Junta de Andalucia (Spain) under Grants No. FQM-101 and No. FQM-6552 (E. G.); by the European Commission (E. C.) under Grant No. PCIG10-GA-2011-303781 (E. G.); by the German Excellence Initiative and the European Union Seventh Framework Programme under Grant Agreement No. 291763 as well as the European Union's Marie Curie COFUND program (A. S. K.); and by the Basic Science Research Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. 2014027937) and the Creative Research Initiatives Program (No. 2014001852) of the NRF grant funded by the Korean government (MEST) (J. A. B.). This manuscript has been co-authored by an employee of Brookhaven Science Associates, LLC, under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. Fermilab is operated by Fermi Research Alliance, LLC, under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.es_ES
dc.description.abstractWe present the first unquenched lattice-QCD calculation of the hadronic form factors for the exclusive decay ¯B→Dℓ¯ν at nonzero recoil. We carry out numerical simulations on 14 ensembles of gauge-field configurations generated with 2+1 flavors of asqtad-improved staggered sea quarks. The ensembles encompass a wide range of lattice spacings (approximately 0.045 to 0.12 fm) and ratios of light (up and down) to strange sea-quark masses ranging from 0.05 to 0.4. For the b and c valence quarks we use improved Wilson fermions with the Fermilab interpretation, while for the light valence quarks we use asqtad-improved staggered fermions. We extrapolate our results to the physical point using rooted staggered heavy-light meson chiral perturbation theory. We then parametrize the form factors and extend them to the full kinematic range using model-independent functions based on analyticity and unitarity. We present our final results for f+(q2) and f0(q2), including statistical and systematic errors, as coefficients of a series in the variable z and the covariance matrix between these coefficients. We then fit the lattice form-factor data jointly with the experimentally measured differential decay rate from BABAR to determine the CKM matrix element, |Vcb|=(39.6±1.7QCD+exp±0.2QED)×10−3. As a byproduct of the joint fit we obtain the form factors with improved precision at large recoil. Finally, we use them to update our calculation of the ratio R(D) in the Standard Model, which yields R(D)=0.299(11).es_ES
dc.description.sponsorshipNational Science Foundation's Teragrid/XSEDE Programes_ES
dc.description.sponsorshipUnited States Department of Energy (DOE) DE-FG02-91ER40628 DE-FC02-06ER41446 DE-SC0010120 DE-FG02-91ER40661 DE-FG02-13ER42001 DE-FG02-ER41976es_ES
dc.description.sponsorshipNational Science Foundation (NSF) PHY10-67881 PHY10-034278 PHY14-17805 PHY09-03571 PHY13-16748es_ES
dc.description.sponsorshipURA Visiting Scholars' programes_ES
dc.description.sponsorshipSpanish Government FPA2010-16696es_ES
dc.description.sponsorshipJunta de Andalucia FQM-101 FQM-6552es_ES
dc.description.sponsorshipEuropean Commission Joint Research Centre PCIG10-GA-2011-303781es_ES
dc.description.sponsorshipGerman Excellence Initiativees_ES
dc.description.sponsorshipEuropean Union (EU) 291763es_ES
dc.description.sponsorshipEuropean Union (EU)es_ES
dc.description.sponsorshipNational Research Foundation of Korea (NRF) - Ministry of Education 2014027937es_ES
dc.description.sponsorshipNRF grant - Korean government (MEST) 2014001852es_ES
dc.description.sponsorshipUnited States Department of Energy (DOE) DE-AC02-98CH10886es_ES
dc.description.sponsorshipFermi Research Alliance, LLC DE-AC02-07CH11359es_ES
dc.publisherAmerican Physical Societyes_ES
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.titleB→Dℓν form factors at nonzero recoil and |Vcb| from 2+1-flavor lattice QCDes_ES

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