Measurements of the branching fractions of Λ+c → pππ+, Λ+c → pKK+, and Λ+c → pπK+

LHCb Collaboration

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Abstract

The ratios of the branching fractions of the decays Λ+c → pππ+, Λ+c → pKK+, and Λ+c → pπK+ with respect to the Cabibbo-favoured Λ+c → pKπ+ 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 fb1: B(Λ+c → pππ+) B(Λ+c → pKπ+) = (7.44 ± 0.08 ± 0.18) %, B(Λ+c → pKK+) B(Λ+c → pKπ+) = (1.70 ± 0.03 ± 0.03) %, B(Λ+c → pπK+) B(Λ+c → pKπ+) = (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+c → pKπ+), the corresponding branching fractions are B(Λ+c → pππ+) = (4.72 ± 0.05 ± 0.11 ± 0.25) × 103, B(Λ+c → pKK+) = (1.08 ± 0.02 ± 0.02 ± 0.06) × 103, B(Λ+c → pπK+) = (1.04 ± 0.09 ± 0.03 ± 0.05) × 104, where the final uncertainty is due to B(Λ+c → pKπ+).

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Nov 3 2017

ASJC Scopus subject areas

  • General

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