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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/222019
Measurements of the branching fraction ratio B(ϕ → µ +µ −)/B(ϕ → e +e −) with charm meson decays
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Measurements of the branching fraction ratio B(ϕ → µ +µ −)/B(ϕ → e +e −) with D+ s → π +ϕ and D+ → π +ϕ decays, denoted Rs ϕπ and Rd ϕπ, are presented. The analysis is performed using a dataset corresponding to an integrated luminosity of 5.4 fb−1 of pp collision data collected with the LHCb experiment. The branching fractions are normalised with respect to the B+ → K+J/ψ(→ e +e −) and B+ → K+J/ψ(→ µ +µ −) decay modes. The combination of the results yields Rϕπ = 1.022 ± 0.012 (stat) ± 0.048 (syst). The result is compatible with previous measurements of the ϕ → ℓ +ℓ − branching fractions and predictions based on the Standard Model.
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COMERMA MONTELLS, Albert, et al. Measurements of the branching fraction ratio B(ϕ → µ +µ −)/B(ϕ → e +e −) with charm meson decays. Journal of High Energy Physics. 2024. Vol. 2024, num. 293. ISSN 1126-6708. [consulted: 8 of August of 2026]. Available at: https://hdl.handle.net/2445/222019