Observation of the Decay Ξ [superscript −][subscript b] → p K [superscript −] K [superscript −]
Name
PhysRevLett.118.071801.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Alkhazov, G.
Alternative Title
Observation of the Decay Ξ − b → p K − K −
Date Issued
February 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaij, R. et al. “Observation of the Decay Ξ [superscript −][subscript b] → PK [superscript −]K [supsercript −].” Physical Review Letters 118.7 (2017): n. pag. © 2017 CERN for the LHCb Collaboration
Version
Final published version
Abstract
Decays of the Ξ[subscript b][superscript -] and Ω[subscript b][superscript -] baryons to the charmless final states ph[superscript -]h[superscript ′-], where h[superscript (′)] 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 √s =7 and 8 TeV, corresponding to an integrated luminosity of 3 fb [superscript -1]. The decay Ξ [subscript b][superscript -] → pK[superscript -]K[superscript -] 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 [subscript b] [superscript -]→pK[superscript -]π[superscript -] decay. Results are reported, relative to the B[superscript -] →K[superscript +]K[superscript -]K[superscript -] normalization channel, for the products of branching fractions and b-hadron production fractions. The branching fractions of Ξ[subscript b][superscript -] →pK[superscript -]π[superscript -] and Ξ[subscript b][superscript -] → pπ[superscript -]π[superscript -] relative to Ξ[subscript b][superscript -] →pK[superscript -]K[superscript -] decays are also measured.
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
http://dx.doi.org/10.1103/PhysRevLett.118.071801
