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Free keywords:
Particle decays, Baryons, Charm quark, Electroweak interaction
MPINP:
LHCb - Abteilung Hinton
Abstract:
A search for the nonresonant Λc+ → pμ+μ− decay is performed using proton-proton collision data recorded at a center-of-mass energy of 13 TeV by the LHCb experiment, corresponding to an integrated luminosity of 5.4 fb−1. No evidence for the decay is found in the dimuon invariant-mass regions where the expected contributions of resonances is subdominant. The upper limit on the branching fraction of the Λc+ → pμ+μ− decay is determined to be 2.9(3.2) × 10−8 at 90%(95%) confidence level. The branching fractions in the dimuon invariant-mass regions dominated by the η, ρ and ω resonances are also determined.