First observation of the decay B+→π+μ+μ−

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RECERCAT Home > Universitat de Barcelona > Física Quàntica i Astrofísica > Articles publicats en revistes (Física Quàntica i Astrofísica) > View document

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Title:	First observation of the decay B+→π+μ+μ−
Author:	LHCb Collaboration; Abellan Beteta, Carlos; Calvo Gómez, M.; Camboni, Alessandro; Comerma Montells, Albert; Domingo Bonal, F.; Garrido Beltrán, Lluís; Gascón Fora, David; Grabalosa Gándara, Marc; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Lopez Asamar, E.; Pérez-Calero Yzquierdo, Antonio; Picatoste Olloqui, Eduardo; Pie Valls, B. (Blai); Potterat, Cédric; Puig Navarro, Albert; Roselló, M.; Ruiz, Hugo (Ruiz Pérez); Vázquez Gómez, R.; Vilasis-Cardona, X.
Other authors:	Universitat de Barcelona
Abstract:	A discovery of the rare decay B + → π + μ + μ − is presented. This decay is observed for the first time, with 5.2 σ significance. The observation is made using pp collision data, corresponding to an integrated luminosity of 1.0 fb−1, collected with the LHCb detector. The measured branching fraction is (2.3 ± 0.6 (stat.) ± 0.1 (syst.))×10−8, and the ratio of the B + → π + μ + μ − and B + → K + μ + μ − branching fractions is measured to be 0.053 ± 0.014 (stat.) ± 0.001 (syst.).
Subject(s):	Teoria quàntica de camps Partícules (Física nuclear) Hadrons Física nuclear Detectors de radiació Quantum field theory Particles (Nuclear physics) Hadrons Nuclear physics Nuclear counters
Rights:	cc by (c) LHCb Collaboration, 2012 http://creativecommons.org/licenses/by/3.0/
Document type:	Article info:eu-repo/semantics/publishedVersion
Published by:	Springer Verlag
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