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oai:recercat.cat:2445/575702025-12-05T16:53:33Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

urn:hdl:2445/57570 Opposite-side flavour tagging of B mesons at the LHCb experiment Abellan Beteta, Carlos Calvo Gómez, Míriam Camboni, Alessandro Comerma Montells, Albert Domingo Bonal, Francesc Garrido Beltrán, Lluís Gascón Fora, David Grabalosa Gándara, Marc Graciani Díaz, Ricardo Graugés Pous, Eugeni López Asamar, Elias Musy, Marco 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 Física nuclear Teoria quàntica de camps Hadrons Mesons (Física nuclear) Gran Col·lisionador d'Hadrons Nuclear physics Quantum field theory Hadrons Mesons (Nuclear physics) Large Hadron Collider (France and Switzerland) The calibration and performance of the opposite-side flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The algorithms have been developed using simulated events and optimized and calibrated with B +→J/ψK +, B 0→J/ψK ∗0 and B 0→D ∗− μ + ν μ decay modes with 0.37 fb−1 of data collected in pp collisions at s√=7~TeV during the 2011 physics run. The opposite-side tagging power is determined in the B +→J/ψK + channel to be (2.10±0.08±0.24) %, where the first uncertainty is statistical and the second is systematic. 2014-09-23T09:13:08Z 2014-09-23T09:13:08Z 2012-02 2014-09-23T09:13:09Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1140/epjc/s10052-012-2022-1 European Physical Journal C, 2012, vol. 72, p. 2022 http://dx.doi.org/10.1140/epjc/s10052-012-2022-1 cc-by (c) LHCb Collaboration, 2012 http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Società Italiana di Fisica & Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)