Test of Lepton Flavor Universality with B s 0 → ϕ ℓ + ℓ − Decays

Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adefisoye, A. A.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Agapopoulou, C.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Akiba, K.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Aliouche, Z.; Alvarez Cartelle, P.; Amalric, R.; Amato, S.; Amey, J. L.; Amhis, Y.; An, L.; Anderlini, L.; Andersson, M.; Andreianov, A.; Andreola, P.; Andreotti, M.; Andreou, D.; Anelli, A.; Ao, D.; Archilli, F.; Argenton, M.; Arguedas Cuendis, S.; Artamonov, A.; Artuso, M.; Aslanides, E.; Ataíde Da Silva, R.; Atzeni, M.; Audurier, B.; Bacher, D.; Bachiller Perea, I.; Bachmann, S.; Bachmayer, M.; Back, J. J.; Baladron Rodriguez, P.; Balagura, V.; Balboni, A.; Baldini, W.; Balzani, L.; Bao, H.; Baptista de Souza Leite, J.; Barbero Pretel, C.; Barbetti, M.; Barbosa, I. R.; Barlow, R. J.; Barnyakov, M.; Barsuk, S.; Barter, W.; Bartolini, M.; Bartz, J.; Basels, J. M.; Bashir, S.; Bassi, G.; Batsukh, B.; Battista, P. 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doi:10.1103/PhysRevLett.134.121803

Test of Lepton Flavor Universality with $B_{s}^{0} \to ϕ ℓ^{+} ℓ^{-}$ Decays

Journal Article · Thu Mar 27 00:00:00 EDT 2025 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.134.121803· OSTI ID:2540170

; ; Abellan Beteta, C.; ; ; ; ; ; ; ; ; Ajaltouni, Z.; ; ; ; ; ; ; ; more »

Lepton flavor universality in rare $b \to s$ transitions is tested for the first time using $B_{s}^{0}$ meson decays. The measurements are performed using $p p$ 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 $B_{s}^{0} \to ϕ e^{+} e^{-}$ and $B_{s}^{0} \to ϕ μ^{+} μ^{-}$ decays are measured in three regions of dilepton mass squared, $q^{2}$ , with $0.1 < q^{2} < 1.1$ , $1.1 < q^{2} < 6.0$ , and $15 < q^{2} < 19 {GeV}^{2} / c^{4}$ . The results agree with the standard model expectation of lepton flavor universality.

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Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI ID:: 2540170

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 134; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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