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. [The LHCb Collaboration]

Test of Lepton Flavor Universality with B⁰ₛ → ϕℓ⁺ ℓ⁻ Decays / R. Aaij, A. . .A.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 134:12(2025 Mar), pp. 121803.1-121803.15. [10.1103/physrevlett.134.121803]

Test of Lepton Flavor Universality with B⁰ₛ → ϕℓ⁺ ℓ⁻ Decays

S. Cesare;C. Mancuso;D. Marangotto;A. Merli;N. Neri;G. Tonani;Z. Wang;
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. [The LHCb Collaboration]
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
   European Particle physics Latin American NETwork
   EPLANET
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   SEVENTH FRAMEWORK PROGRAMME - SP3-People - Marie-Curie Actions
   246806
mar-2025
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1250742
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