Limits on the electromagnetic and weak dipole moments of the tau-lepton in E6 superstring models

被引：25

作者：

Gutierrez-Rodriguez, A. ^{[1
]}

Hernandez-Ruiz, M. A. ^{[2
]}

Perez, M. A. ^{[3
]}

机构：

[1] Univ Autonoma Zacatecas, Fac Fis, Cuerpo Acad Particulas Campos & Astrofis, Zacatecas 98060, Mexico

[2] Univ Autonoma Zacatecas, Fac Ciencias Quim, Zacatecas 98060, Mexico

[3] CINVESTAV, Dept Fis, Mexico City 07000, DF, Mexico

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2007年 / 22卷 / 20期

关键词：

electric and magnetic moments; taus; neutral currents; models beyond the Standard Model;

D O I：

10.1142/S0217751X07036865

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 E-6 inspired models with an additional neutral vector boson Z(theta). Using as an input the data obtained by the L3 and OPAL collaborations for the reaction e(+) e(-) -> tau(+) tau(-) gamma, we get a stringent limit on the LRSM mixing angle phi, -1.66 x 10(-3) < phi < 1.22 x 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(-) -> tau(+) tau(-) . We also get similar bounds for the weak dipole moments of the tau lepton in the framework of E-6 superstring models.

引用

页码：3493 / 3508

页数：16

共 49 条

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