R(J/ψ) and B_{c}
Phys Rev Lett
; 125(22): 222003, 2020 Nov 27.
Article
em En
| MEDLINE
| ID: mdl-33315442
ABSTRACT
We use our lattice QCD computation of the B_{c}âJ/ψ form factors to determine the differential decay rate for the semitauonic decay channel and construct the ratio of branching fractions R(J/ψ)=B(B_{c}^{-}âJ/ψτ^{-}ν[over ¯]_{τ})/B(B_{c}^{-}âJ/ψµ^{-}ν[over ¯]_{µ}). We find R(J/ψ)=0.2582(38) and give an error budget. We also extend the relevant angular observables, which were recently suggested for the study of lepton flavor universality violating effects in BâD^{*}âν, to B_{c}âJ/ψâν and make predictions for their values under different new physics scenarios.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article