Studies of the decays B[superscript +] → p[¯ over p]h[superscript +] and observation of B[superscript +] → [¯ over Λ](1520)p
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Aaij-2013-Studies of the decay.pdf
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Author(s)
Williams, Michael
Date Issued
September 2013
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Studies of the decays B[superscript +] → p[¯ over p]h[superscript +] and observation of B[superscript +] → [¯ over Λ](1520)p.” Physical Review D 88, no. 5 (September 2013). © 2013 CERN, for the LHCb Collaboration
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Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.88.052015
