Studies of the decays B[superscript +] → p[¯ over p]h[superscript +] and observation of B[superscript +] → [¯ over Λ](1520)p

• Main Author: Williams, Michael (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: American Physical Society, 2014-02-03T18:57:51Z.
• Subjects: Article
• Online Access: Get fulltext

 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[superscript −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 p[¯ over p] rest frame is measured. No significant CP asymmetry in B[superscript +] → p[¯over p]K[superscript +] decay is found in any region of the Dalitz plane. We present the first observation of the decay B[superscript +]→[¯ over Λ](1520)(→ K[superscript +][¯ over p])p near the K[superscript +][¯ over p] threshold and measure B(B[superscript +] → [¯ over Λ](1520)p) = (3.9[+1.0 over −0.9](stat) ±0.1(syst) ± 0.3(BF)) ×10[superscript −7], where BF denotes the uncertainty on secondary branching fractions.