Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays
Joint Authors
Chang, Qin
Zhu, Jie
Wang, Xiao-Lin
Li, Xiao-Nan
Source
Advances in High Energy Physics
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-29
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
In this paper, we investigate the tree-dominated B¯u,d,s,c∗⟶Vℓ−ν¯ℓ (V=Du,d∗,Ds∗,J/ψ and ℓ=e,μ,τ) decays in the Standard Model with the relevant form factors obtained in the light-front quark model.
These decays involve much more helicity states relative to the corresponding B¯∗⟶Pℓ−ν¯ℓ and B¯⟶Vℓ−ν¯ℓ decays, and moreover, the contribution of longitudinal polarization mode (V meson) is relatively small, ~30%, compared with the corresponding B meson decays.
We have also computed the branching fraction, lepton spin asymmetry, forward-backward asymmetry, and ratio RV∗L≡BB¯∗⟶Vτ−ν¯τ/BB¯∗⟶Vℓ′−ν¯ℓ′ℓ′=e,μ.
Numerically, the branching fractions of B¯∗⟶Vℓ′−ν¯ℓ′ decays are at the level of O10−7 and are hopeful to be observed by LHC and Belle-II experiments.
The ratios RD∗,Ds∗,J/ψ∗L have relatively small theoretical uncertainties and are close to each other, RD∗∗L≃RDs∗∗L≃RJ/ψ∗L≃0.26,0.270.27,0.29, which are a bit different from the predictions in some previous works.
The future measurements are expected to make tests on these predictions.
American Psychological Association (APA)
Chang, Qin& Wang, Xiao-Lin& Zhu, Jie& Li, Xiao-Nan. 2020. Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays. Advances in High Energy Physics،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1126537
Modern Language Association (MLA)
Chang, Qin…[et al.]. Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays. Advances in High Energy Physics No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1126537
American Medical Association (AMA)
Chang, Qin& Wang, Xiao-Lin& Zhu, Jie& Li, Xiao-Nan. Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays. Advances in High Energy Physics. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1126537
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1126537