Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays
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...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2020/3079670 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832559245952811008 |
|---|---|
| author | Qin Chang Xiao-Lin Wang Jie Zhu Xiao-Nan Li |
| author_facet | Qin Chang Xiao-Lin Wang Jie Zhu Xiao-Nan Li |
| author_sort | Qin Chang |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-dc78edaed2f3443e96a37ea67a65a1b4 |
| institution | Kabale University |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-dc78edaed2f3443e96a37ea67a65a1b42025-02-03T01:30:31ZengWileyAdvances in High Energy Physics1687-73571687-73652020-01-01202010.1155/2020/30796703079670Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ DecaysQin Chang0Xiao-Lin Wang1Jie Zhu2Xiao-Nan Li3Institute of Particle and Nuclear Physics, Henan Normal University, Henan 453007, ChinaInstitute of Particle and Nuclear Physics, Henan Normal University, Henan 453007, ChinaSchool of Physics and Electronic Engineering, Anyang Normal University, Henan 455000, ChinaSchool of Physics and Electronic Engineering, Anyang Normal University, Henan 455000, ChinaIn 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.http://dx.doi.org/10.1155/2020/3079670 |
| spellingShingle | Qin Chang Xiao-Lin Wang Jie Zhu Xiao-Nan Li Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays Advances in High Energy Physics |
| title | Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays |
| title_full | Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays |
| title_fullStr | Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays |
| title_full_unstemmed | Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays |
| title_short | Study of b⟶c Induced B¯∗⟶Vℓν¯ℓ Decays |
| title_sort | study of b⟶c induced b¯∗⟶vlν¯l decays |
| url | http://dx.doi.org/10.1155/2020/3079670 |
| work_keys_str_mv | AT qinchang studyofbcinducedbvlnldecays AT xiaolinwang studyofbcinducedbvlnldecays AT jiezhu studyofbcinducedbvlnldecays AT xiaonanli studyofbcinducedbvlnldecays |