CP-violation through scalar tau oscillation

被引：10

作者：

Choi, SY ^{[1
]}

Drees, M

机构：

[1] Yonsei Univ, Dept Phys, Seoul 120749, South Korea

[2] APCTP, Seoul 130012, South Korea

来源：

PHYSICS LETTERS B | 1998年 / 435卷 / 3-4期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1016/S0370-2693(98)00800-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We point out that oscillation between the two scaler tau (<(tau)over tilde>) mass eigenstates can give rise to CP-violation if some parameters appearing in the stau or chargino/neutralino mass matrices are complex. If <(tau)over tilde>(+) and <(tau)over tilde>(-) decay into different charginos or neutralinos, rate asymmetries as large as 20% are possible. IF both staus decay directly into tau + LSP, CP-violation can in principle still be observed through an energy asymmetry of the tau decay products, but this asymmetry never exceeds the percent level. Even the rate asymmetries become small if the mass splitting between the two stau mass eigenstates is larger than 1%. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：356 / 363

页数：8

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