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http://hdl.handle.net/2445/131779
Title: | Measurement of the B+ → ωℓ+ν branching fraction with semileptonically tagged B mesons |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Mesuraments físics Particle physics Experiments Physical measurements |
Issue Date: | 15-Oct-2013 |
Publisher: | American Physical Society |
Abstract: | We report a measurement of the branching fraction of the exclusive charmless semileptonic decay B + → ω ℓ + ν , where ℓ is either an electron or a muon. We use samples of B + mesons tagged by a reconstructed charmed semileptonic decay of the other B meson in the event. The measurement is based on a data set of 426.1 fb − 1 of e + e − collisions at a center-of-mass energy of 10.58 GeV recorded with the BABAR detector at the PEP-II asymmetric-energy e + e − storage rings. We measure a branching fraction of B ( B + → ω ℓ + ν ) = ( 1.35 ± 0.21 ± 0.11 ) × 10 − 4 , where the uncertainties are statistical and systematic, respectively. We also present measurements of the partial branching fractions in three bins of q 2 , the invariant-mass squared of the lepton-neutrino system, and we compare them to theoretical predictions of the form factors. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.88.072006 |
It is part of: | Physical Review D, 2013, vol. 88, num. 7, p. 072006 |
URI: | http://hdl.handle.net/2445/131779 |
Related resource: | https://doi.org/10.1103/PhysRevD.88.072006 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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