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]| File | Dimensione | Formato | |
|---|---|---|---|
|
PhysRevLett134121803.pdf
accesso aperto
Tipologia:
Publisher's version/PDF
Licenza:
Creative commons
Dimensione
1.17 MB
Formato
Adobe PDF
|
1.17 MB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.




