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https://hdl.handle.net/2445/222019| Title: | Measurements of the branching fraction ratio B(ϕ → µ +µ −)/B(ϕ → e +e −) with charm meson decays |
| Author: | Comerma Montells, Albert Garcia Moreno, Paula Garrido Beltrán, Lluís Gioventù, Alessandra Gironella Gironell, Pere Gomez Fernandez, Sergio Graugés Pous, Eugeni Lobo Salvia, Aniol López Huertas, Albert Manera Escalero, Rafel Marin Benito, Carla Mauricio Ferre, Joan Alfonso Albero, Alejandro Vazquez Gomez, Ricardo LHCb Collaboration |
| Keywords: | Física de partícules Leptons (Física nuclear) Hadrons Particle physics Leptons (Nuclear physics) Hadrons |
| Issue Date: | 2024 |
| Publisher: | Springer Verlag |
| 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. |
| Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP05(2024)293 |
| It is part of: | Journal of High Energy Physics, 2024, vol. 2024, num.293 |
| URI: | https://hdl.handle.net/2445/222019 |
| Related resource: | https://doi.org/10.1007/JHEP05(2024)293 |
| ISSN: | 1126-6708 |
| Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) |
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