First Observation of a Baryonic B[superscript +][subscript c] Decay
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PhysRevLett.113.152003.pdf
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Author(s)
Counts, Ian Thomas Hunt
Ilten, Philip J
Date Issued
October 2014
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Aaij, R., et al. “First Observation of a Baryonic B[superscript +][subscript c] Decay.” Physical Review Letters, vol. 113, no. 15, Oct. 2014. © 2014 CERN, for the LHCb Collaboration.
Version
Final published version
Abstract
A baryonic decay of the B[superscript +][subscript c] meson, B[superscript +][subscript c] → J/ψp[bar over p]π[superscript +], is observed for the first time, with a significance of 7.3 standard deviations, in pp collision data collected with the LHCb detector and corresponding to an integrated luminosity of 3.0 fb[superscript -1] taken at center-of-mass energies of 7 and 8 TeV. With the B[superscript +][subscript c] → J/ψπ[superscript +] decay as the normalization channel, the ratio of branching fractions is measured to be B(B[superscript +][subscript c] → J/ψp[subscript p]π[superscript +])/B(B[superscript +][subscript c] → J/ψπ[superscript +]) = 0.143 +0.039 -0.034 (stat) ± 0.013(syst). The mass of the B[superscript +][subscript c] meson is determined as M(B[superscript +][subscript c]) = 6274.0 ± 1.8(stat) ± 0.4(syst) MeV/c[superscript 2], using the B[superscript +][subscript c] → J/ψp[bar over p]π[superscript +] channel.
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
https://doi.org/10.1103/PHYSREVLETT.113.152003
