Phenomenological Study of Lepton Flavor Violation in Z Boson Decays with Constrained MSSM Extended by Type-II Seesaw Model
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| Format: | Preprint |
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2024
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| _version_ | 1866909548244107264 |
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| author | Hajahmad, Vael Ali, Murhaf Alsayed |
| author_facet | Hajahmad, Vael Ali, Murhaf Alsayed |
| contents | In this work, we study the lepton flavor violation (LFV) of Z boson decays in the framework of the constrained minimal supersymmetric standard model (CMSSM) extended by the type-II seesaw model. The branching ratios of $Z\longrightarrow l_i l_j$ decays are calculated in this model. Here, $l_i$ and $l_j$ are different flavor charged leptons. After fitting to the experimental mass limits of the neutrino and supersymmetric particles, we have found that the branching ratios for LFV decays of Z boson are in the order of $6 \times {10}^{-10}$ for $e μ$ channel and of $1 \times {10}^{-9}$ for both $τμ$ and $τe$ decay channels. Considering recent experimental constraints on $l_{i}\rightarrow l_{j} γ$ decays, the branching ratios for LFV decays of Z boson get an additional suppression of $10^{-8}$ for $e μ$ channel and of $10^{-3}$ for both $τμ$ and $τe$ decay channels. The branching ratios theoretical predictions are several orders below the recent experimental limits for both scenarios, which give a very low probability to observe the LFV decays of Z boson in the future experiments. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_12992 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phenomenological Study of Lepton Flavor Violation in Z Boson Decays with Constrained MSSM Extended by Type-II Seesaw Model Hajahmad, Vael Ali, Murhaf Alsayed High Energy Physics - Phenomenology In this work, we study the lepton flavor violation (LFV) of Z boson decays in the framework of the constrained minimal supersymmetric standard model (CMSSM) extended by the type-II seesaw model. The branching ratios of $Z\longrightarrow l_i l_j$ decays are calculated in this model. Here, $l_i$ and $l_j$ are different flavor charged leptons. After fitting to the experimental mass limits of the neutrino and supersymmetric particles, we have found that the branching ratios for LFV decays of Z boson are in the order of $6 \times {10}^{-10}$ for $e μ$ channel and of $1 \times {10}^{-9}$ for both $τμ$ and $τe$ decay channels. Considering recent experimental constraints on $l_{i}\rightarrow l_{j} γ$ decays, the branching ratios for LFV decays of Z boson get an additional suppression of $10^{-8}$ for $e μ$ channel and of $10^{-3}$ for both $τμ$ and $τe$ decay channels. The branching ratios theoretical predictions are several orders below the recent experimental limits for both scenarios, which give a very low probability to observe the LFV decays of Z boson in the future experiments. |
| title | Phenomenological Study of Lepton Flavor Violation in Z Boson Decays with Constrained MSSM Extended by Type-II Seesaw Model |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.12992 |