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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2301.06034 |
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| _version_ | 1866929438727340032 |
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| author | Sun, Ke-Sheng Wang, Zhi-Chuan Yang, Xiu-Yi Gao, Tie-Jun Zhang, Hai-Bin |
| author_facet | Sun, Ke-Sheng Wang, Zhi-Chuan Yang, Xiu-Yi Gao, Tie-Jun Zhang, Hai-Bin |
| contents | The one-loop contributions to the flavor-changing neutral current decays of the top quark into a light quark and a gauge boson or Higgs boson, namely $t\rightarrow qV,qh$, with $q$ being $u$ or $c$, and $V$ being $γ$, $g$, or $Z$, are analyzed in this study within the framework of the minimal R-symmetric supersymmetric standard model. The charginos in this model have been separated into two sets, i.e., $χ$-chargino and $ρ$-chargino. The numerical results reveal that gluino or $ρ$-chargino predominantly dictate the predictions for BR($t\rightarrow qV,qh$), while the impact of neutralino or $χ$-chargino contributions is insignificant. By incorporating the constraints imposed by the squark mixing parameters from $\bar{B}\rightarrow X_sγ$ and $B^0_{d,s}\rightarrow μ^+μ^-$, the theoretical predictions for BR($t\rightarrow qg$) can be significantly augmented to approximately $\mathcal O(10^{-5}-10^{-6})$. On the other hand, the values of BR($t\rightarrow qγ,qZ,qh$) are predicted to be at least four orders of magnitude below the current experimental limits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_06034 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Rare top quark decays in the minimal R-symmetric supersymmetric standard model Sun, Ke-Sheng Wang, Zhi-Chuan Yang, Xiu-Yi Gao, Tie-Jun Zhang, Hai-Bin High Energy Physics - Phenomenology The one-loop contributions to the flavor-changing neutral current decays of the top quark into a light quark and a gauge boson or Higgs boson, namely $t\rightarrow qV,qh$, with $q$ being $u$ or $c$, and $V$ being $γ$, $g$, or $Z$, are analyzed in this study within the framework of the minimal R-symmetric supersymmetric standard model. The charginos in this model have been separated into two sets, i.e., $χ$-chargino and $ρ$-chargino. The numerical results reveal that gluino or $ρ$-chargino predominantly dictate the predictions for BR($t\rightarrow qV,qh$), while the impact of neutralino or $χ$-chargino contributions is insignificant. By incorporating the constraints imposed by the squark mixing parameters from $\bar{B}\rightarrow X_sγ$ and $B^0_{d,s}\rightarrow μ^+μ^-$, the theoretical predictions for BR($t\rightarrow qg$) can be significantly augmented to approximately $\mathcal O(10^{-5}-10^{-6})$. On the other hand, the values of BR($t\rightarrow qγ,qZ,qh$) are predicted to be at least four orders of magnitude below the current experimental limits. |
| title | Rare top quark decays in the minimal R-symmetric supersymmetric standard model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2301.06034 |