Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/133580
Title: Observation of B0→¯¯¯D0K+K− and Evidence for B0s→¯¯¯D0K+K−
Author: Abellan Beteta, Carlos
Calvo Gómez, Míriam
Camboni, Alessandro
Comerma Montells, Albert
Domingo Bonal, Francesc
Garrido Beltrán, Lluís
Grabalosa Gándara, Marc
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
López Asamar, Elias
Pérez-Calero Yzquierdo, Antonio
Picatoste Olloqui, Eduardo
Pie Valls, B. (Blai)
Potterat, Cédric
Puig Navarro, Albert
Roselló, M.
Ruiz, Hugo (Ruiz Pérez)
Vázquez Gómez, Ricard
Vilasis-Cardona, Xavier
LHCb Collaboration
Gascón Fora, David
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 26-Sep-2012
Publisher: American Physical Society
Abstract: The first observation of the decay B 0 → ¯¯¯ D 0 K + K − is reported from an analysis of 0.62     fb − 1 of p p collision data collected with the LHCb detector. Its branching fraction is measured relative to that of the topologically similar decay B 0 → ¯¯¯ D 0 π + π − to be B ( B 0 → ¯¯¯ D 0 K + K − ) B ( B 0 → ¯¯¯ D 0 π + π − ) = 0.056 ± 0.011 ± 0.007 , where the first uncertainty is statistical and the second is systematic. The significance of the signal is 5.8 σ . Evidence, with 3.8 σ significance, for B 0 s → ¯¯¯ D 0 K + K − decays is also presented. The relative branching fraction is measured to be B ( B 0 s → ¯¯¯ D 0 K + K − ) B ( B 0 → ¯¯¯ D 0 K + K − ) = 0.90 ± 0.27 ± 0.20 . These channels are of interest to study the mechanisms behind hadronic B decays, and open new possibilities for C P violation analyses with larger data sets.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.109.131801
It is part of: Physical Review Letters, 2012, vol. 109, num. 13, p. 131801
URI: http://hdl.handle.net/2445/133580
Related resource: https://doi.org/10.1103/PhysRevLett.109.131801
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Electrònica)

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