We report the first observation of a baryonic B-s(0) decay B-s(0). p (Lambda) over barK(-) using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7, 8 TeV, corresponding to an integrated luminosity of 3.0 fb(-1). The branching fraction is measured to be B(B-s(0) -> p (Lambda) over bar K-)+ B(B-s(0) -> p (Lambda) over bar K+) [5.46 +/- 0.61 +/- 0.57 +/- 0.50(B) +/- 0.32(f(s)/(d))] x 10(-6) where the first uncertainty is statistical , the second systematic the third uncertainty accounts for the experimental uncertainty on the branching fraction of the B-0 -> p (Lambda) over bar pi(-) decay used for normalization, the fourth uncertainty relates to the knowledge of the ratio of b-quark hadronization probabilities f(s)/f(d).
First Observation of a Baryonic B-s(0) Decay
Dettori F.;Manca G.;Oldeman R.;Saitta B.;
2017-01-01
Abstract
We report the first observation of a baryonic B-s(0) decay B-s(0). p (Lambda) over barK(-) using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7, 8 TeV, corresponding to an integrated luminosity of 3.0 fb(-1). The branching fraction is measured to be B(B-s(0) -> p (Lambda) over bar K-)+ B(B-s(0) -> p (Lambda) over bar K+) [5.46 +/- 0.61 +/- 0.57 +/- 0.50(B) +/- 0.32(f(s)/(d))] x 10(-6) where the first uncertainty is statistical , the second systematic the third uncertainty accounts for the experimental uncertainty on the branching fraction of the B-0 -> p (Lambda) over bar pi(-) decay used for normalization, the fourth uncertainty relates to the knowledge of the ratio of b-quark hadronization probabilities f(s)/f(d).File | Dimensione | Formato | |
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PhysRevLett.119.041802.pdf
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