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Search for Bbar to Lambda_c+ X l- nu Decays in Events with a Fully Reconstructed B Meson

Lees, J. P ; Poireau, V ; Tisserand, V ; Garra Tico, J ; Grauges, E ; Martinelli, M ; Milanes, D.A ; Palano, A ; Pappagallo, M ; Eigen, G ; Stugu, B ; Sun, L ; Brown, D. N ; Kerth, L. T ; Kolomensky, Yu. G ; Lynch, G ; Tanabe, T ; Koch, H ; Schroeder, T ; Asgeirsson, D. J ; Hearty, C

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Título:
Search for Bbar to Lambda_c+ X l- nu Decays in Events with a Fully Reconstructed B Meson
Autor: Lees, J. P ; Poireau, V ; Tisserand, V ; Garra Tico, J ; Grauges, E ; Martinelli, M ; Milanes, D.A ; Palano, A ; Pappagallo, M ; Eigen, G ; Stugu, B ; Sun, L ; Brown, D. N ; Kerth, L. T ; Kolomensky, Yu. G ; Lynch, G ; Tanabe, T ; Koch, H ; Schroeder, T ; Asgeirsson, D. J ; Hearty, C
Assuntos: 43 Particle Accelerators ; B Mesons ; Charmed Baryons ; Decay ; Experiment-Hep,Hepex ; Resonance ; Storage Rings Experiment-Hep,Hepex
Notas: Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology; Journal Volume: 85
Descrição: We present a search for semileptonic B decays to the charmed baryon {Lambda}{sub c}{sup +} based on 420 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} storage rings. By fully reconstructing the recoiling B in a hadronic decay mode, we reduce non-B backgrounds and determine the flavor of the signal B. We statistically correct the flavor for the effect of the B{sup 0} mixing. We obtain a 90% confidence level upper limit of {Beta}({bar B} {yields} {Lambda}{sub c}{sup +} X{ell}{sup -} {bar {nu}}{sub {ell}})/{Beta}({bar B} {yields} {Lambda}{sub c}{sup +} X) < 3.5%.
Editor: SLAC National Accelerator Laboratory
Data de criação/publicação: 2012-04
Idioma: Inglês

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