Lepton flavor violation in string-inspired models

被引：68

作者：

King, SF ^{[1
]}

Oliveira, M

机构：

[1] CERN, Div Theory, CH-1211 Geneva 23, Switzerland

[2] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England

来源：

PHYSICAL REVIEW D | 1999年 / 60卷 / 03期

关键词：

D O I：

10.1103/PhysRevD.60.035003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Lepton flavor violation has been proposed as a significant test of supersymmetric unification. Here we show that such signals are also a generic feature of supersymmetric string unified models in which there is no simple unified gauge group. In realistic models of this kind which involve third family Yukawa unification and large values of tan beta, there are generally heavy right-handed (singlet) neutrinos of intermediate mass M-nu, whose couplings violate lepton flavor. To illustrate these effects we calculate the rates for mu --> e + gamma and tau --> mu + gamma in the minimal supersymmetric SU(4) x SU(2)(L) x SU(2)(R) model. Including only the minimum irreducible contributions, we find that both rates are enhanced relative to similar models with low tan beta, with tau --> mu + gamma providing a decisive test of such models in the near future. [S0556-2821(99)03213-0].

引用

页数：18

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