In this study,we analyze the rare decays of the neutral vector mesons J/ψ and Υ(nS)in the scenario of the minimal R-symmetric supersymmetric standard model using the effective Lagrangian method.The predicted branchi...In this study,we analyze the rare decays of the neutral vector mesons J/ψ and Υ(nS)in the scenario of the minimal R-symmetric supersymmetric standard model using the effective Lagrangian method.The predicted branching ratios are dominated by the mass insertion parameters δ^(ij),i.e.,the off-diagonal inputs,and the contributions of different parts are comparable.Taking into account the experimental constraints on the mass insertion parameters,the predicted branching ratios for the most promising processes Υ(nS)→lτ are ten orders of magnitude smaller than the present experimental bounds.展开更多
A future Z-factory will offer the possibility of studying rare Z decays Z → l_1l_2, such as those leading to lepton flavor violation(LFV) final states. In this work, by considering the constraints from radiative two-...A future Z-factory will offer the possibility of studying rare Z decays Z → l_1l_2, such as those leading to lepton flavor violation(LFV) final states. In this work, by considering the constraints from radiative two-body decays l_2→ l_1γ, we investigate the LFV decays Z → l_1l_2 in the framework of the Minimal R-symmetric Supersymmetric Standard Model with two benchmark points from the existing literature. The flavor-violating off-diagonal entries Б^(12), Б^(13) and Б^(23) are constrained by the current experimental bounds of l_2→ l_1γ. Considering recent experimental constraints, we also investigate Br(Z → l_1l_2) as a function of M_D^W. The numerical results show that the theoretical predictions of Br( Z → l_1l_2) in the MRSSM are several orders of magnitude below the current experimental bounds. The LFV decays Z → eτ and Z →μт may be promising observation targets in future experiments.展开更多
基金Supported by the Natural Science Foundation of Hebei Province(A2022104001,A2022201017)the Shanxi Scholarship Council of China(2021-31)+1 种基金the youth top-notch talent support program of the Hebei Provincethe Foundation of Baoding University(2018Z01)
文摘In this study,we analyze the rare decays of the neutral vector mesons J/ψ and Υ(nS)in the scenario of the minimal R-symmetric supersymmetric standard model using the effective Lagrangian method.The predicted branching ratios are dominated by the mass insertion parameters δ^(ij),i.e.,the off-diagonal inputs,and the contributions of different parts are comparable.Taking into account the experimental constraints on the mass insertion parameters,the predicted branching ratios for the most promising processes Υ(nS)→lτ are ten orders of magnitude smaller than the present experimental bounds.
基金Supported by the National Natural Science Foundation of China(NNSFC)(11747064,11805140)the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(2017113)+1 种基金the Foundation of Department of Education of Liaoning province(2016TSPY10)the Youth Foundation of the University of Science and Technology Liaoning(2016QN11)
文摘A future Z-factory will offer the possibility of studying rare Z decays Z → l_1l_2, such as those leading to lepton flavor violation(LFV) final states. In this work, by considering the constraints from radiative two-body decays l_2→ l_1γ, we investigate the LFV decays Z → l_1l_2 in the framework of the Minimal R-symmetric Supersymmetric Standard Model with two benchmark points from the existing literature. The flavor-violating off-diagonal entries Б^(12), Б^(13) and Б^(23) are constrained by the current experimental bounds of l_2→ l_1γ. Considering recent experimental constraints, we also investigate Br(Z → l_1l_2) as a function of M_D^W. The numerical results show that the theoretical predictions of Br( Z → l_1l_2) in the MRSSM are several orders of magnitude below the current experimental bounds. The LFV decays Z → eτ and Z →μт may be promising observation targets in future experiments.
