Measurements of the branching fraction ratio B(ϕ → μ+ μ−)/B(ϕ → e+ e−) with Ds+ → π+ ϕ and D+ → π+ ϕ decays, denoted R_ϕπ^s and R_ϕπ^d, 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 R_ϕπ = 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.

Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Measurements of the branching fraction ratio B(ϕ → μ+ μ−)/B(ϕ → e+ e−) with charm meson decays. JOURNAL OF HIGH ENERGY PHYSICS, 2024(5), 0-23 [10.1007/jhep05(2024)293].

Measurements of the branching fraction ratio B(ϕ → μ+ μ−)/B(ϕ → e+ e−) with charm meson decays

Carbone, A.;Ferrari, F.;Galli, D.;Patrignani, C.;Spedicato, E.;Villa, A.;
2024

Abstract

Measurements of the branching fraction ratio B(ϕ → μ+ μ−)/B(ϕ → e+ e−) with Ds+ → π+ ϕ and D+ → π+ ϕ decays, denoted R_ϕπ^s and R_ϕπ^d, 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 R_ϕπ = 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.
2024
Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., et al. (2024). Measurements of the branching fraction ratio B(ϕ → μ+ μ−)/B(ϕ → e+ e−) with charm meson decays. JOURNAL OF HIGH ENERGY PHYSICS, 2024(5), 0-23 [10.1007/jhep05(2024)293].
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoulou, C.; Aidala, C....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/1005993
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