Observation of the baryonic decay [bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +]
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PhysRevD.91.031102.pdf
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Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Date Issued
February 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., et al. "Observation of the baryonic decay [bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +]." Phys. Rev. D 91, 031102 (February 2015).
Version
Final published version
Abstract
We report the observation of the baryonic decay [bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +] using a data sample of 471 × 10[superscript 6] B[bar over B] pairs produced in e[superscript +]e[superscript -] annihilations at √s = 10.58 GeV. This data sample was recorded with the BABAR detector at the PEP-II storage ring at SLAC. We find B([bar over B][superscript 0 → Λ[+ over c][bar over p]K[superscript -]K[superscript +]) = (2.5 ± 0.4[subscript (stat)] ± 0.2[subscript (syst)] ± 0.6[subscript B(Λ[+ over c])) × 10[superscript -5], where the uncertainties are statistical, systematic, and due to the uncertainty of the Λ[+ over c] → pK[superscript -]π[superscript +] branching fraction, respectively. The result has a significance corresponding to 5.0 standard deviations, including all uncertainties. For the resonant decay [bar over B][superscript 0] → Λ[+ over c][bar over p]ϕ, we determine the upper limit B([bar over B][superscript 0] → Λ[+ over c][bar over p]ϕ) < 1.2 × 10[superscript -5] at 90% confidence level.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.91.031102
