A measurement of the ratio of branching fractions (Formula presented) in the (Formula presented), (Formula presented) decay channel is presented. This measurement uses a sample of proton-proton collision data collected at a center-of-mass energy of (Formula presented) by the CMS experiment in 2018, corresponding to an integrated luminosity of (Formula presented). The measured ratio, (Formula presented), agrees with the value of (Formula presented) predicted by the standard model, which assumes lepton flavor universality. By testing lepton flavor universality, this measurement is a probe of new physics using (Formula presented) mesons, which are currently only produced at the LHC.

Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., et al. (2025). Test of lepton flavor universality in semileptonic (Formula presented) meson decays in proton-proton collisions at (Formula presented). PHYSICAL REVIEW D, 111(5) [10.1103/PhysRevD.111.L051102].

Test of lepton flavor universality in semileptonic (Formula presented) meson decays in proton-proton collisions at (Formula presented)

Xiao J.;Boldrini G.;Brivio F.;Cetorelli F.;De Guio F.;Dinardo M. E.;Gerosa R.;Ghezzi A.;Govoni P.;Guzzi L.;Lucchini M. T.;Malberti M.;Massironi A.;Moroni L.;Paganoni M.;Palluotto S.;Pinolini B. S.;Pizzati G.;Ragazzi S.;Tabarelli de Fatis T.;
2025

Abstract

A measurement of the ratio of branching fractions (Formula presented) in the (Formula presented), (Formula presented) decay channel is presented. This measurement uses a sample of proton-proton collision data collected at a center-of-mass energy of (Formula presented) by the CMS experiment in 2018, corresponding to an integrated luminosity of (Formula presented). The measured ratio, (Formula presented), agrees with the value of (Formula presented) predicted by the standard model, which assumes lepton flavor universality. By testing lepton flavor universality, this measurement is a probe of new physics using (Formula presented) mesons, which are currently only produced at the LHC.
Articolo in rivista - Articolo scientifico
proton-proton collisions
English
17-mar-2025
2025
111
5
L051102
none
Hayrapetyan, A., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Chatterjee, S., et al. (2025). Test of lepton flavor universality in semileptonic (Formula presented) meson decays in proton-proton collisions at (Formula presented). PHYSICAL REVIEW D, 111(5) [10.1103/PhysRevD.111.L051102].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/576245
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