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Search for the rare decay of charmed baryon Λc+ into the pμ+μ final state

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Schmelling,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertyaev,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

LHCb Collaboration, Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2024). Search for the rare decay of charmed baryon Λc+ into the pμ+μ final state. Physical Review D, 110(5): 052007. doi:10.1103/PhysRevD.110.052007.


Cite as: https://hdl.handle.net/21.11116/0000-000F-E0A3-B
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.