Extraction of |Vub| with Reduced Dependence on Shape Functions

Simple item page
dc.creatorGolubev, V. B.
dc.creatorLuth, V. G.
dc.creatorSkovpen, Yu. I.
dc.date2007-02-07
dc.date2007-09-19
dc.date.accessioned2026-07-07T11:22:36Z
dc.date.available2026-07-07T11:22:36Z
dc.descriptionUsing BaBar measurements of the inclusive electron spectrum in B->X_u e nu decays and the inclusive photon spectrum in B->X_s gamma decays, we extract the magnitude of the CKM matrix element Vub. The extraction is based on theoretical calculations designed to reduce the theoretical uncertainties by exploiting the assumption that the leading shape functions are the same for all b->q transitions (q is a light quark). The results agree well with the previous analysis, have indeed smaller theoretical errors, but are presently limited by the knowledge of the photon spectrum and the experimental errors on the lepton spectrum.
dc.description7 pages, 5 figures, 4 tables. The version submitted to Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-ph/0702072
dc.identifierhttp://arxiv.org/abs/hep-ph/0702072
dc.identifierPhys.Rev.D76:114003,2007
dc.identifierdoi:10.1103/PhysRevD.76.114003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194625
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.titleExtraction of |Vub| with Reduced Dependence on Shape Functions
dc.typetext

Files

Collections

arXiv