Dynamics and direct CP 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 pp 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 pp̄ rest frame is measured. No significant CP asymmetry in B +→pp̄K + decay is found in any region of the Dalitz plane. We present the first observation of the decay B +→Λ̄(1520)(→K +p̄)p near the K +p̄ threshold and measure B(B +→Λ̄ (1520)p)=(3.9-0.9+1.0(stat)±0.1(syst)±0.3(BF))×10 -7, where BF denotes the uncertainty on secondary branching fractions.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|Publication status||Published - 19 Sep 2013|
Copyright 2013 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)