Exclusive decays J/ψ→ D_(s)^(*)- ℓ⁺ ν_ℓ in a covariant constituent quark model with infrared confinement

2017/01/25 by Mikhail A. Ivanov, Chien-Thang Tran
Physics and Astronomy · #hep-ph

paper · pdf · doi:10.1103/physrevd.92.074030

published as Physical Review D 92, 114022 (2015) · 18 pages, 6 figures, 6 tables, published (2015). arXiv admin note: text overlap with arXiv:1508.02678

arxiv created 2017/01/25 · arxiv updated 2017/01/26

Abstract

We investigate the exclusive semileptonic decays J/ψ→ D_(s)^(*)- ℓ⁺ ν_ℓ, where ℓ=e,μ, within the Standard Model. The relevant transition form factors are calculated in the framework of a relativistic constituent quark model with built-in infrared confinement. Our calculations predict the branching fractions B(J/ψ→ D_(s)^(*)- ℓ⁺ ν_ℓ) to be of the order of 10^-10 for D_s^(*)- and 10^-11 for D^(*)-. Most of our numerical results are consistent with other theoretical studies. However, some branching fractions are larger than those calculated in QCD sum rules approaches but smaller than those obtained in the covariant light-front quark model by a factor of about 2-3.

Citations

• Exclusive decaysB→ℓ−ν¯andB→D(*)ℓ−ν¯in the covariant quark model