Abellan Beteta, CarlosCalvo Gómez, MíriamCamboni, AlessandroComerma Montells, AlbertDomingo Bonal, FrancescGarrido Beltrán, LluísGrabalosa Gándara, MarcGraciani Díaz, RicardoGraugés Pous, EugeniLópez Asamar, EliasPérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPie Valls, B. (Blai)Potterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Vázquez Gómez, RicardVilasis-Cardona, XavierLHCb Collaboration2014-07-302014-07-302013-02-191126-6708https://hdl.handle.net/2445/56456The angular distribution and differential branching fraction of the decay B +→ K + μ + μ − are studied with a dataset corresponding to 1.0fb−1 of integrated luminosity, collected by the LHCb experiment. The angular distribution is measured in bins of dimuon invariant mass squared and found to be consistent with Standard Model expectations. Integrating the differential branching fraction over the full dimuon invariant mass range yields a total branching fraction of B (B + → K + μ + μ −) = (4.36 ± 0.15 ± 0.18) × 10−7. These measurements are the most precise to date of the B + → K + μ + μ − decay.15 p.application/pdfengcc by, (c) LHCb Collaboration, 2013http://creativecommons.org/licenses/by/3.0/http://creativecommons.org/licenses/by/3.0/Gran Col·lisionador d'HadronsTeoria quàntica de campsRelativitat (Física)Partícules (Física nuclear)Large Hadron Collider (France and Switzerland)Quantum field theoryRelativity (Physics)Particles (Nuclear physics)info:eu-repo/semantics/article6196342014-07-30info:eu-repo/semantics/openAccess