Measurement of the Λ_{b}
Phys Rev Lett
; 131(15): 151801, 2023 Oct 13.
Article
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| ID: mdl-37897753
ABSTRACT
The branching fraction of the rare decay Λ_{b}^{0}âΛ(1520)µ^{+}µ^{-} is measured for the first time, in the squared dimuon mass intervals q^{2}, 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 q^{2} interval, q^{2}>15.0 GeV^{2}/c^{4}, where theoretical predictions have the smallest model dependence, agrees with the predictions.
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En
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Phys Rev Lett
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2023
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Article