THE DECAY-RATE ASYMMETRY OF THE TOP-QUARK

被引：35

作者：

GRZADKOWSKI, B ^{[1
]}

KEUNG, WY ^{[1
]}

机构：

[1] CERN,DIV THEORY,CH-1211 GENEVA 23,SWITZERLAND

来源：

PHYSICS LETTERS B | 1993年 / 319卷 / 04期

关键词：

D O I：

10.1016/0370-2693(93)91761-B

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The asymmetries A(k) = [GAMMA(t --> W+d(k))-GAMMA(tBAR --> W-d(k)BAR)]/[GAMMA(t --> W+d(k))+GAMMA(tBAR --> W-d(k)BAR)] in the partial widths of the top quark decays are discussed within the Standard Model (SM), the Two-Higgs-Doublet Model (2HDM) and supersymmetric extensions of the SM (SSM). The leading contributions to these asymmetries in the SM and in the 2HDM are induced by the up-type quark self-energy diagrams and are found to be very small. However, in the SSM, the asymmetry A(b) can be substantial, O (alpha(QCD)), provided the CP-violating phase of gluino-top-stop couplings is not suppressed. Within the SSM A(b) is generated by the vertex corrections.

引用

页码：526 / 532

页数：7

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