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.

Measurements of the branching fraction ratio $$ \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {\textrm{e}}^{+}{\textrm{e}}^{-}\right) $$ with charm meson decays / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:5(2024). [10.1007/jhep05(2024)293]

Measurements of the branching fraction ratio $$ \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {\textrm{e}}^{+}{\textrm{e}}^{-}\right) $$ with charm meson decays

Casse, G.;Sarti, A.;
2024

Abstract

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.
2024
B Physics, Branching fraction, Charm Physics, Hadron-Hadron Scattering
01 Pubblicazione su rivista::01a Articolo in rivista
Measurements of the branching fraction ratio $$ \mathcal{B}\left(\phi \to {\mu}^{+}{\mu}^{-}\right)/\mathcal{B}\left(\phi \to {\textrm{e}}^{+}{\textrm{e}}^{-}\right) $$ with charm meson decays / Null, N., Aaij, R., Abdelmotteleb, A.S.W., Abellan Beteta, C., Abudinén, F., Ackernley, T., Adeva, B., Adinolfi, M., Adlarson, P., Agapopoulou, C., Aidala, C.A., Ajaltouni, Z., Akar, S., Akiba, K., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Aliouche, Z., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2024:5(2024). [10.1007/jhep05(2024)293]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1720307
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