First Observation of a Baryonic B[superscript 0][subscript s]
Name
PhysRevLett.119.041802.pdf
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318.29 KB
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Checksum (MD5)
9828b16098ba895a7036e8c120c6502a
Author(s)
Boettcher, Thomas Julian
Ilten, Philip J
Williams, Michael
Date Issued
July 2017
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Aaij, R., et al. “First Observation of a Baryonic B s 0 Decay.” Physical Review Letters, vol. 119, no. 4, July 2017. © 2017 CERN
Version
Final published version
Abstract
We report the first observation of a baryonic B[superscript 0][subscript s] decay, B[subscript 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 over Λ]K[superscript -])+B(B[subscript 0][subscript s]→[bar over p]ΛK[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[superscript 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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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.119.041802
