First Observation of a Baryonic B[superscript 0][subscript s] Decay
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PhysRevLett.119.041802.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Date Issued
July 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R., et al. “First Observation of a Baryonic B[superscript 0][subscript s] Decay.” Physical Review Letters, vol. 119, no. 4, July 2017. © 2017 American Physical Society
Version
Final published version
Abstract
We report the first observation of a baryonic B[superscript 0][subscript s] decay, B[superscript 0][subscript s] →p[bar over Λ]K[superscript -], using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0 fb[superscript -1]. The branching fraction is measured to be B(B[superscript 0][subscript s] → p[bar overΛ]K[superscript -]) + B(B[superscript 0][subscript s] → p[bar over Λ]K[superscript +])=[5.46 ± 0.61 ± 0.57 ± 0.50(B) ±0.32(f[subscript s}]/f[subscript d])] × 10[superscript -6], where the first uncertainty is statistical and the second systematic, the third uncertainty accounts for the experimental uncertainty on the branching fraction of the B[subscript 0] → p[bar over Λ]π[superscript -] decay used for normalization, and the fourth uncertainty relates to the knowledge of the ratio of b-quark hadronization probabilities f[subscript s]/f[subscript d].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.119.041802
