Limits on the Electromagnetic and Weak Dipole Moments of the Tau-Lepton in E(6) Superstring Models
Limits on the Electromagnetic and Weak Dipole Moments of the Tau-Lepton in E(6) Superstring Models
复制标题
E(6)超弦模型中Tau-轻子电磁和弱偶极矩的极限
DOI：
10.1142/s0217751x07036865
复制
发表时间：
2006
影响因子：
1.6
通讯作者：
M. A. Pérez
中科院分区：
文献类型：
--
作者：
A. Gutiérrez;M. A. Hernandez;M. A. Pérez
We obtain limits on the electromagnetic and weak dipole moments of the tau-lepton in the framework of a left–right symmetric model (LRSM) and a class of E6 inspired models with an additional neutral vector boson Zθ. Using as an input the data obtained by the L3 and OPAL collaborations for the reaction e+e- → τ+τ-γ, we get a stringent limit on the LRSM mixing angle ϕ, -1.66 × 10-3 < ϕ<1.22×10-3, which in turn induces bounds on the tau weak dipole moments which are consistent with the bounds obtained recently by the DELPHI and ALEPH collaborations from the reaction e+e-→τ+τ-. We also get similar bounds for the weak dipole moments of the tau lepton in the framework of E6 superstring models.
