Calvo Gómez, MíriamCamboni, AlessandroComerma Montells, AlbertGarrido Beltrán, LluísGraciani Díaz, RicardoGraugés Pous, EugeniOyanguren Campos, Arantza dePérez-Calero Yzquierdo, AntonioPicatoste Olloqui, EduardoPotterat, CédricRives Molina, Vicente JoséRuiz, Hugo (Ruiz Pérez)Ruiz Valls, PabloVilasis-Cardona, XavierLHCb Collaboration2019-04-082019-04-082013-09-191550-7998https://hdl.handle.net/2445/131824Dynamics and direct C P violation in three-body charmless decays of charged B mesons to a proton, an antiproton and a light meson (pion or kaon) are studied using data, corresponding to an integrated luminosity of 1.0     fb − 1 , collected by the LHCb experiment in p p collisions at a center-of-mass energy of 7 TeV. Production spectra are determined as a function of Dalitz-plot and helicity variables. The forward-backward asymmetry of the light meson in the p ¯ p rest frame is measured. No significant C P asymmetry in B + → p ¯ p K + decay is found in any region of the Dalitz plane. We present the first observation of the decay B + → ¯¯¯ Λ ( 1520 ) ( → K + ¯ p ) p near the K + ¯ p threshold and measure B ( B + → ¯¯¯ Λ ( 1520 ) p ) = ( 3.9 + 1.0 − 0.9 ( stat ) ± 0.1 ( syst ) ± 0.3 ( BF ) ) × 10 − 7 , where BF denotes the uncertainty on secondary branching fractions.13 p.application/pdfengcc by (c) CERN; LHCb Collaboration, 2013http://creativecommons.org/licenses/by/3.0/es/Física de partículesExperimentsCol·lisions (Física nuclear)Particle physicsExperimentsCollisions (Nuclear physics)info:eu-repo/semantics/article6290222019-04-08info:eu-repo/semantics/openAccess