Lepton flavor universality in rare b→s transitions is tested for the first time using Bs0 meson decays. The measurements are performed using pp collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fb-1. Branching fraction ratios between the Bs0→φe+e- and Bs0→φμ+μ- decays are measured in three regions of dilepton mass squared, q2, with 0.1<1.1, 1.1<6.0, and 15<19 GeV2/c4. The results agree with the standard model expectation of lepton flavor universality.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Test of Lepton Flavor Universality with Bs0 →φℓ+ℓ- Decays. PHYSICAL REVIEW LETTERS, 134(12) [10.1103/PhysRevLett.134.121803].

Test of Lepton Flavor Universality with Bs0 →φℓ+ℓ- Decays

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Kirsebom V. S.;Malentacca L.;Martinazzoli L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;
2025

Abstract

Lepton flavor universality in rare b→s transitions is tested for the first time using Bs0 meson decays. The measurements are performed using pp collision data collected by the LHCb experiment between 2011 and 2018, corresponding to a total integrated luminosity of 9 fb-1. Branching fraction ratios between the Bs0→φe+e- and Bs0→φμ+μ- decays are measured in three regions of dilepton mass squared, q2, with 0.1<1.1, 1.1<6.0, and 15<19 GeV2/c4. The results agree with the standard model expectation of lepton flavor universality.
Articolo in rivista - Articolo scientifico
Branching fractions; Dileptons; Integrated luminosity; Lepton-flavor; Meson decays; The standard model
English
27-mar-2025
2025
134
12
121803
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Test of Lepton Flavor Universality with Bs0 →φℓ+ℓ- Decays. PHYSICAL REVIEW LETTERS, 134(12) [10.1103/PhysRevLett.134.121803].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/579187
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