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Measurement of the Λb0→Λ(1520)μ+μ Differential Branching Fraction

MPS-Authors
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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., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2023). Measurement of the Λb0→Λ(1520)μ+μ Differential Branching Fraction. Physical Review Letters, 131(15): 151801. doi:10.1103/PhysRevLett.131.151801.


Cite as: https://hdl.handle.net/21.11116/0000-000D-DFD5-8
Abstract
The branching fraction of the rare decay Λb0→Λ(1520)μ+μ is measured for the first time, in the squared dimuon mass intervals q2, excluding the J/ψ and ψ(2S) regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9  fb−1. The result in the highest q2 interval, q2 > 15.0  GeV2/c4, where theoretical predictions have the smallest model dependence, agrees with the predictions.