Studies of the decays B[superscript +] → p[¯ over p]h[superscript +] and observation of B[superscript +] → [¯ over Λ](1520)p
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-...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/84653 https://orcid.org/0000-0001-8285-3346 |
| Summary: | 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. |
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