First Observation of the Rare Purely Baryonic Decay B⁰→pp¯
Name
PhysRevLett.119.232001.pdf
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Author(s)
LHCB Collaboration
Boettcher, Thomas Julian
Craik, Daniel C
Ilten, Philip J
Williams, Michael
Date Issued
December 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R. et al. “First Observation of the Rare Purely Baryonic Decay
B⁰→pp¯.” Physical Review Letters 119, 23 (December 2017): 232001 © 2017 CERN for the LHCb Collaboration
Version
Final published version
Abstract
The first observation of the decay of a B⁰ meson to a purely baryonic final state, B⁰→pp, is reported. The proton-proton collision data sample used was collected with the LHCb experiment at center-of-mass energies of 7 and 8 TeV and corresponds to an integrated luminosity of 3.0 fb⁻¹. The branching fraction is determined to be B(B⁰→pp)=(1.25±0.27±0.18)×10⁻⁸, where the first uncertainty is statistical and the second systematic. The decay mode B⁰→pp is the rarest decay of the B⁰ meson observed to date. The decay B[subscript s]⁰→pp is also investigated. No signal is seen and the upper limit B(B[subscript s]⁰→pp) < 1.5×10⁻⁸ at 90% confidence level is set on the branching fraction.
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.119.232001
