Study Of Decay Process ??ev_?v_e In The B-LSSM

The discovery of Higgs marks the great success of the standard model!However,the standard model cannot explain the problem of norm levels,nor can it explain the asymmetry of cosmic matter and antimatter,so it is considered a low-energy approximation of the more basic theory under the weak electric energy scale.The supersymmetry expansion of the standard model can not only explain the problem of norm levels and antimatter asymmetry of cosmic matter,but also provide candidates for cold and dark matter,and introduce the see-saw mechanism to explain the tiny mass of neutrinos in the left hand.However,the experimental data of LHC shows that the mass of supersymmetric particles is likely to be much greater than 1TeV,which makes the difficulty of directly detecting supersymmetric particles experimentally with a collider.B-LSSM,as an extended model of minimal supersymmetry,can naturally introduce the seesaw mechanism to generate neutrino masses in the left hand,provide candidates for dark matter,and self-consistently explain norm levels and antimatter asymmetry in cosmic matter.At the same time,the spontaneous symmetry breaking of the U(1)B-L group in the model does not affect the R parity conservation used to ensure the stability of protons Has many good advantagesAs a third-generation lepton,?-lepton compares with the other two generations.The decay characteristic of pure or semi-lepton of ?-is that it can detect the coupling of weak electric structure and its standard boson.This work analyzes the decay process ?-?e-v?ve in the framework of B-LSSM,and explores the effect of new particles of the model on the branching ratio in B-LSSM.Starting from the overpotential and soft breaking terms of B-LSSM,the process of superfield,mass matrix,and diagonalization are analyzed,and the width and branching ratio of ?-?e-v?ve decay process are given.Specific expressions,and analyze and compare the calculation results with experimental valuesBecause the right-handed lepton that is prohibited from appearing in the standard model,and the experimental restrictions on the Wilson coefficient of the decay process are relatively broad,we also calculated the ratio of the right-handed lepton appearing in the decay process under the B-LSSM.By studying the measurable shape parameters QLR and QRL,the model parameter space can be restricted.