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.

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

Galati G.;Pappagallo M.;
2025-01-01

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/547098
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