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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/196766
Measurement of the differential branching fraction of the decay Λb0→Λμ+μ-
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The differential branching fraction of the decay Λ0 b → Λμ+μ− is measured as a function of the square of the dimuon invariant mass, q2. A yield of 78 ± 12 Λ0 b → Λμ+μ− decays is observed using data, corresponding to an integrated luminosity of 1.0 fb−1, collected by the LHCb experiment at a centre-of-mass energy of 7 TeV. A significant signal is found in the q2 region above the square of the J /ψ mass, while at lower-q2 values upper limits are set on the differential branching fraction. Integrating the differential branching fraction over q2, while excluding the J /ψ and ψ(2S) regions, gives a branching fraction of B(Λ0 b → Λμ+μ−) = (0.96 ± 0.16(stat) ± 0.13(syst) ± 0.21(norm)) × 10−6, where the uncertainties are statistical, systematic and due to the normalisation mode, Λ0 b → J /ψΛ, respectively.
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LHCb Collaboration, et al. Measurement of the differential branching fraction of the decay Λb0→Λμ+μ-. Physics Letters B. 2013. Vol. 725, num. 25-35. ISSN 0370-2693. [consulted: 17 of June of 2026]. Available at: https://hdl.handle.net/2445/196766