Journal
PHYSICAL REVIEW LETTERS
Volume 113, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.141801
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- CERN
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- Direct For Mathematical & Physical Scien [1205805] Funding Source: National Science Foundation
- STFC [ST/M001431/1, ST/K502236/1, ST/J004332/1, LHCb, ST/I505572/1, LHCb Upgrades, ST/L003112/1, ST/L006340/1, ST/K001361/1, ST/I000097/1, ST/F007094/1, ST/H001069/2, ST/M000761/1, ST/L006146/1, ST/L00352X/1, ST/K003534/1, ST/K001302/1, PP/E003095/1, ST/J005495/1, ST/K00140X/1, ST/L003538/1, ST/K000705/1, ST/H006737/1, ST/H001026/1, ST/H001093/1, ST/L001195/1, ST/I003576/1, ST/J004855/1, PP/E000355/1, ST/L003392/1, ST/L001144/1, ST/H00100X/2, PP/E000347/1, ST/G005974/1, ST/H00100X/1, ST/H001026/2, ST/K00137X/1, ST/K00073X/1, ST/K003410/1, ST/H001093/2] Funding Source: UKRI
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Three-body B+ -> p (p) over barK(+) and B+ -> p (p) over bar pi(+) 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 CP violation in the B+ -> p (p) over barK(+) 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) over bar rest frame yield A(FB)(p (p) over barK(+), m(p (p) over bar) < 2.85 GeV/c(2)) = 0.495 +/- 0.012 (stat) +/- 0.007 (syst) and A(FB)(p<(p)over bar>pi(+), m(p (p) over bar) < 2.85 GeV/c(2)) = -0.409 +/- 0.033 (stat) +/- 0.006 (syst). In addition, the branching fraction of the decay B+ -> <(Lambda)over bar>(1520)p is measured to be B(B+ -> (Lambda) over bar (1520)p) = (3.15 +/- 0.48 (stat) +/- 0.07 (syst) +/- 0.26 (BF)) x 10(-7), where BF denotes the uncertainty on secondary branching fractions.
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