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Article
Report number arXiv:1711.01157 ; CERN-EP-2017-247 ; LHCB-PAPER-2017-026 ; LHCB-PAPER-2017-026
Title Measurements of the branching fractions of Λ+cpππ+Λ+cpππ+, Λ+cpKK+Λ+cpKK+, and Λ+cpπK+Λ+cpπK+
Author(s) LHCb Collaboration  Pokaż wszystkich 808 autorów
Publication 2018-03-08
Imprint 03 Nov 2017
Number of pages 22
Note All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2017-026.html. Addition of supplementary information on selection efficiencies and yield evaluations
In: JHEP 03 (2018) pp.043
DOI 10.1007/JHEP03(2018)043
10.1007/JHEP03(2018)043
Subject category Particle Physics - Experiment ; hep-ex
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; charm physics
Abstract The ratios of the branching fractions of the decays Λ+cpππ+Λ+cpππ+, Λ+cpKK+Λ+cpKK+, and Λ+cpπK+Λ+cpπK+ with respect to the Cabibbo-favoured Λ+cpKπ+Λ+cpKπ+ decay are measured using proton-proton collision data collected with the LHCb experiment at a 7 TeV centre-of-mass energy and corresponding to an integrated luminosity of 1.0 fb11: B(Λ+cpππ+)B(Λ+cpKπ+)=(7.44±0.08±0.18)%,B(Λ+cpKK+)B(Λ+cpKπ+)=(1.70±0.03±0.03)%,B(Λ+cpπK+)B(Λ+cpKπ+)=(0.165±0.015±0.005)%, where the uncertainties are statistical and systematic, respectively. These results are the most precise measurements of these quantities to date. When multiplied by the world-average value for B(Λ+cpKπ+), the corresponding branching fractions are B(Λ+cpππ+)=(4.72±0.05±0.11±0.25)×103,B(Λ+cpKK+)=(1.08±0.02±0.02±0.06)×103,B(Λ+cpπK+)=(1.04±0.09±0.03±0.05)×104, where the final uncertainty is due to B(Λ+cpKπ+).
Copyright/License Preprint: © 2017-2025 CERN (License: CC-BY-4.0)



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