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Title: Search for the decay Bs0→D*∓π±
Author: Camboni, Alessandro
Comerma Montells, Albert
Garrido Beltrán, Lluís
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Potterat, Cédric
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Abellan Beteta, Carlos
Calvo Gómez, Míriam
Oyanguren Campos, M. de
Ruiz Valls, Pablo
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Particle physics
Issue Date: 1-Apr-2013
Publisher: American Physical Society
Abstract: A search for the decay B 0 s → D * ∓ π ± is presented using a data sample corresponding to an integrated luminosity of 1.0     fb − 1 of p p collisions collected by LHCb. This decay is expected to be mediated by a W -exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help us to understand the mechanism behind related decays such as B 0 s → π + π − and B 0 s → D ¯¯¯ D . Systematic uncertainties are minimized by using B 0 → D * ∓ π ± as a normalization channel. We find no evidence for a signal, and set an upper limit on the branching fraction of B ( B 0 s → D * ∓ π ± ) < 6.1 ( 7.8 ) × 10 − 6 at 90% (95%) confidence level.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2013, vol. 87, num. 7, p. 071101(R)
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ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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