Top quark decays with flavor violation in the B-LSSM
Abstract The decays of top quark $$t\rightarrow c\gamma ,\;t\rightarrow cg,\;t\rightarrow cZ,\;t\rightarrow ch$$ t→cγ,t→cg,t→cZ,t→ch are extremely rare processes in the standard model (SM). The predictions on the corresponding branching ratios in the SM are too small to be detected in the future, he...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-06-01
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| Series: | European Physical Journal C: Particles and Fields |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-018-5919-5 |
| _version_ | 1818254324250181632 |
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| author | Jin-Lei Yang Tai-Fu Feng Hai-Bin Zhang Guo-Zhu Ning Xiu-Yi Yang |
| author_facet | Jin-Lei Yang Tai-Fu Feng Hai-Bin Zhang Guo-Zhu Ning Xiu-Yi Yang |
| author_sort | Jin-Lei Yang |
| collection | DOAJ |
| description | Abstract The decays of top quark $$t\rightarrow c\gamma ,\;t\rightarrow cg,\;t\rightarrow cZ,\;t\rightarrow ch$$ t→cγ,t→cg,t→cZ,t→ch are extremely rare processes in the standard model (SM). The predictions on the corresponding branching ratios in the SM are too small to be detected in the future, hence any measurable signal for the processes at the LHC is a smoking gun for new physics. In the extension of minimal supersymmetric standard model with an additional local $$U(1)_B\text {--}L$$ U(1)B--L gauge symmetry (B-LSSM), new gauge interaction and new flavor changing interaction affect the theoretical evaluations on corresponding branching ratios of those processes. In this work, we analyze those processes in the B-LSSM, under a minimal flavor violating assumption for the soft breaking terms. Considering the constraints from updated experimental data, the numerical results imply $$Br(t\rightarrow c\gamma )\sim 5\times 10^{-7}$$ Br(t→cγ)∼5×10-7 , $$Br(t\rightarrow cg)\sim 2\times 10^{-6}$$ Br(t→cg)∼2×10-6 , $$Br(t\rightarrow cZ)\sim 4\times 10^{-7}$$ Br(t→cZ)∼4×10-7 and $$Br(t\rightarrow ch)\sim 3\times 10^{-9}$$ Br(t→ch)∼3×10-9 in our chosen parameter space. Simultaneously, new gauge coupling constants $$g_{_B},\;g_{_{YB}}$$ gB,gYB in the B-LSSM can also affect the numerical results of $$Br(t\rightarrow c\gamma ,\;cg,\;cZ,\;ch)$$ Br(t→cγ,cg,cZ,ch) . |
| first_indexed | 2024-12-12T16:54:09Z |
| format | Article |
| id | doaj.art-bd80d6e957c446b7b99288516ea78a59 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-12T16:54:09Z |
| publishDate | 2018-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-bd80d6e957c446b7b99288516ea78a592022-12-22T00:18:17ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522018-06-0178611010.1140/epjc/s10052-018-5919-5Top quark decays with flavor violation in the B-LSSMJin-Lei Yang0Tai-Fu Feng1Hai-Bin Zhang2Guo-Zhu Ning3Xiu-Yi Yang4Department of Physics, Hebei UniversityDepartment of Physics, Hebei UniversityDepartment of Physics, Hebei UniversityDepartment of Physics, Hebei UniversityDepartment of Science, University of Science and Technology LiaoningAbstract The decays of top quark $$t\rightarrow c\gamma ,\;t\rightarrow cg,\;t\rightarrow cZ,\;t\rightarrow ch$$ t→cγ,t→cg,t→cZ,t→ch are extremely rare processes in the standard model (SM). The predictions on the corresponding branching ratios in the SM are too small to be detected in the future, hence any measurable signal for the processes at the LHC is a smoking gun for new physics. In the extension of minimal supersymmetric standard model with an additional local $$U(1)_B\text {--}L$$ U(1)B--L gauge symmetry (B-LSSM), new gauge interaction and new flavor changing interaction affect the theoretical evaluations on corresponding branching ratios of those processes. In this work, we analyze those processes in the B-LSSM, under a minimal flavor violating assumption for the soft breaking terms. Considering the constraints from updated experimental data, the numerical results imply $$Br(t\rightarrow c\gamma )\sim 5\times 10^{-7}$$ Br(t→cγ)∼5×10-7 , $$Br(t\rightarrow cg)\sim 2\times 10^{-6}$$ Br(t→cg)∼2×10-6 , $$Br(t\rightarrow cZ)\sim 4\times 10^{-7}$$ Br(t→cZ)∼4×10-7 and $$Br(t\rightarrow ch)\sim 3\times 10^{-9}$$ Br(t→ch)∼3×10-9 in our chosen parameter space. Simultaneously, new gauge coupling constants $$g_{_B},\;g_{_{YB}}$$ gB,gYB in the B-LSSM can also affect the numerical results of $$Br(t\rightarrow c\gamma ,\;cg,\;cZ,\;ch)$$ Br(t→cγ,cg,cZ,ch) .http://link.springer.com/article/10.1140/epjc/s10052-018-5919-5Rare decayB-LSSMTop quark |
| spellingShingle | Jin-Lei Yang Tai-Fu Feng Hai-Bin Zhang Guo-Zhu Ning Xiu-Yi Yang Top quark decays with flavor violation in the B-LSSM European Physical Journal C: Particles and Fields Rare decay B-LSSM Top quark |
| title | Top quark decays with flavor violation in the B-LSSM |
| title_full | Top quark decays with flavor violation in the B-LSSM |
| title_fullStr | Top quark decays with flavor violation in the B-LSSM |
| title_full_unstemmed | Top quark decays with flavor violation in the B-LSSM |
| title_short | Top quark decays with flavor violation in the B-LSSM |
| title_sort | top quark decays with flavor violation in the b lssm |
| topic | Rare decay B-LSSM Top quark |
| url | http://link.springer.com/article/10.1140/epjc/s10052-018-5919-5 |
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