Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/133088
Title: Evidence for CP Violation in B+→p¯pK+ Decays
Author: Badalov, Alexey
Calvo Gómez, Míriam
Garrido Beltrán, Lluís
Gascón Fora, David
Graciani Díaz, Ricardo
Graugés Pous, Eugeni
Marin Benito, Carla
Picatoste Olloqui, Eduardo
Rives Molina, Vicente José
Ruiz, Hugo (Ruiz Pérez)
Vilasis-Cardona, Xavier
LHCb Collaboration
Keywords: Física de partícules
Experiments
Particle physics
Experiments
Issue Date: 29-Sep-2014
Publisher: American Physical Society
Abstract: Three-body B + → p ¯ p K + and B + → p ¯ p π + decays are studied using a data sample corresponding to an integrated luminosity of 3.0     fb − 1 collected by the LHCb experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV. Evidence of C P violation in the B + → p ¯ p K + decay is found in regions of the phase space, representing the first measurement of this kind for a final state containing baryons. Measurements of the forward-backward asymmetry of the light meson in the p ¯ p rest frame yield A FB ( p ¯ p K + , m p ¯ p < 2.85     GeV / c 2 ) = 0.495 ± 0.012     ( stat ) ± 0.007     ( syst ) and A FB ( p ¯ p π + , m p ¯ p < 2.85     GeV / c 2 ) = − 0.409 ± 0.033     ( stat ) ± 0.006     ( syst ) . In addition, the branching fraction of the decay B + → ¯ Λ ( 1520 ) p is measured to be B ( B + → ¯ Λ ( 1520 ) p ) = ( 3.15 ± 0.48     ( stat ) ± 0.07     ( syst ) ± 0.26     ( BF ) ) × 1 0 − 7 , where BF denotes the uncertainty on secondary branching fractions.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.113.141801
It is part of: Physical Review Letters, 2014, vol. 113, num. 14, p. 141801
URI: http://hdl.handle.net/2445/133088
Related resource: https://doi.org/10.1103/PhysRevLett.113.141801
ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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