We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B-0-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universalityviolating contributions. We use events where one neutral B is fully reconstructed in (sic)(4S) -> B (B) over bar decays in data corresponding to 189 fb(-1) integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations.
Adachi, I., Adamczyk, K., Aggarwal, L., Aihara, H., Akopov, N., Aloisio, A., et al. (2023). Tests of Light-Lepton Universality in Angular Asymmetries of B^{0}→D^{*-}ℓν Decays. PHYSICAL REVIEW LETTERS, 131(18), 181801-1-181801-7 [10.1103/PhysRevLett.131.181801].
Tests of Light-Lepton Universality in Angular Asymmetries of B^{0}→D^{*-}ℓν Decays
Branchini, PMembro del Collaboration Group
;Budano, AMembro del Collaboration Group
;Bussino, SMembro del Collaboration Group
;De Pietro, GMembro del Collaboration Group
;Laurenza, MMembro del Collaboration Group
;Martellini, CMembro del Collaboration Group
;Martini, AMembro del Collaboration Group
;
2023-01-01
Abstract
We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B-0-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universalityviolating contributions. We use events where one neutral B is fully reconstructed in (sic)(4S) -> B (B) over bar decays in data corresponding to 189 fb(-1) integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
