非普适规范玻色子Z′与轻子味破坏过程

Non-universal Gauge Boson Z′ and the Lepton Flavor Violation Processes

许多超出标准模型的新物理理论预言了非普适规范玻色子Z′的存在,这种新粒子可在高能对撞机实验中产生可观测的物理迹象.计算了顶色辅助的人工色(TC2)和味普适 TC2 模型预言的 Z′对轻味子破坏(LFV)过程 Z→lilj,li→ljγ,li→lilkll 以及li→ljνlνl的贡献.计算结果表明:Z′可对这些过程产生有意义的修正.在绝大部分参数空间内,Z′对某些过程(如Z→τμ,τ→μee)的贡献可被将来的高能实验观测到.这些结果对将来的高能实验探测新物理有一定的帮助.

Many new physics theories beyond the standard model predict the existence of the non-universal gauge boson Z′,which can produce characteristic signatures at the present or future collider experiments.We study and calculate the contributions of Z′predicted by the topcolor-assisted technicolor technicolor (TC2) models or the flavor-universal TC2 models to the lepton flavor violation processes Z→l_il_j,l_i→l_jγ,l_i→l_jl_kl_l and l_i→l_jν_l(ν_l).The numerical results show that Z′ can give significantly contributions to these processes.In most part of the parameter space,the contributions of Z′ to some of these process might be detected in the future high energy experiments,which is helpful to test new physics in the future collider experiments.