Observation of the Decay Ξ_{b}^{-}→pK^{-}K^{-}.
Copyright policy )Observation of the Decay Ξ_{b}^{-}→pK^{-}K^{-}.
Decays of the Ξ_{b}^{-} and Ω_{b}^{-} baryons to the charmless final states ph^{-}h^{'-}, where h^{(')} denotes a kaon or pion, are searched for with the LHCb detector. The analysis is based on a sample of proton-proton collision data collected at center-of-mass energies sqrt[s]=7 and 8 TeV, corresponding to an integrated luminosity of 3 fb^{-1}. The decay Ξ_{b}^{-}→pK^{-}K^{-} is observed with a significance of 8.7 standard deviations, and evidence at the level of 3.4 standard deviations is found for the Ξ_{b}^{-}→pK^{-}π^{-} decay. Results are reported, relative to the B^{-}→K^{+}K^{-}K^{-} normalization channel, for the products of branching fractions and b-hadron production fractions. The branching fractions of Ξ_{b}^{-}→pK^{-}π^{-} and Ξ_{b}^{-}→pπ^{-}π^{-} relative to Ξ_{b}^{-}→pK^{-}K^{-} decays are also measured.
- University of Warwick United Kingdom
- University of Milan Italy
- University of Milano-Bicocca Italy
- Spanish National Research Council Spain
- Institute for High Energy Physics Russian Federation
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE, General Physics, Multidisciplinary, Science & Technology, 02 Physical Sciences, Physics, Physics, Multidisciplinary, Branching fraction CP violation Flavor physics Rare decay Hadron-Hadron scattering (experiments), 500, 530, Heavy Quark Baryons; b-Baryons; Charmless final states; b-hadron production, Physics and Astronomy (all), LHCb, Physical Sciences, TOOL, HEP; LHC; LHCb; Bottom baryons (|B|>0); Hadronic decays of baryons; Charge conjugation parity time reversal and other discrete symmetries;, LHCb - Abteilung Hinton, PACKAGE; TOOL, PACKAGE
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE, General Physics, Multidisciplinary, Science & Technology, 02 Physical Sciences, Physics, Physics, Multidisciplinary, Branching fraction CP violation Flavor physics Rare decay Hadron-Hadron scattering (experiments), 500, 530, Heavy Quark Baryons; b-Baryons; Charmless final states; b-hadron production, Physics and Astronomy (all), LHCb, Physical Sciences, TOOL, HEP; LHC; LHCb; Bottom baryons (|B|>0); Hadronic decays of baryons; Charge conjugation parity time reversal and other discrete symmetries;, LHCb - Abteilung Hinton, PACKAGE; TOOL, PACKAGE
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