Observation of the doubly Cabibbo-suppressed decay Ξ c+ → pϕ
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Author(s)
Boettcher, Thomas Julian
Craik, Daniel C
Weisser, Constantin
Williams, M.
LHCb Collaboration
Date Issued
April 2019
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
LHCb Collaboration (Aaij, R. et al.). "Observation of the doubly Cabibbo-suppressed decay Ξ c+ → pϕ." Journal of High Energy Physics 2019, 4 (April 2019): 84
Version
Final published version
Abstract
The doubly Cabibbo-suppressed decay Ξ c+ → pϕ with ϕ → K+K− is observed for the first time, with a statistical significance of more than fifteen standard deviations. The data sample used in this analysis corresponds to an integrated luminosity of 2 fb−1 recorded with the LHCb detector in pp collisions at a centre-of-mass energy of 8 TeV. The ratio of branching fractions between the decay Ξ c+ → pϕ and the singly Cabibbo-suppressed decay Ξ c+→ pK−π+ is measured to be ℬΞc+ → p ϕℬΞc+ → pK−π+ = 19.8 ± 0.7 ± 0.9 ± 0.2 × 10 −3, where the first uncertainty is statistical, the second systematic and the third due to the knowledge of the ϕ → K+K− branching fraction.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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DOI of Published Version
https://doi.org/10.1007/JHEP04(2019)084
