We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B0-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-universality-violating contributions. We use events where one neutral B is fully reconstructed in (4S)→BB¯ 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.
Tests of Light-Lepton Universality in Angular Asymmetries of B0 → D − lν Decays
Bianchi, F.;Das, S.;Destefanis, M.;Maggiora, M.;Marcello, S.;Spataro, S.;
2023-01-01
Abstract
We present the first comprehensive tests of the universality of the light leptons in the angular distributions of semileptonic B0-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-universality-violating contributions. We use events where one neutral B is fully reconstructed in (4S)→BB¯ 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.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
PhysRevLett.131.181801.pdf
Accesso aperto
Descrizione: paper
Tipo di file:
PDF EDITORIALE
Dimensione
7.44 MB
Formato
Adobe PDF
|
7.44 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.



