Atomic parity violation, leptoquarks, and contact interactions

被引：37

作者：

Barger, V

Cheung, K

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

[2] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICS LETTERS B | 2000年 / 480卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(00)00401-9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The recent measurement of atomic parity violation in cesium atoms shows a 2.3 sigma deviation from the standard model prediction. We show that such an effect can be explained by four-fermion contact interactions with specific chiralities or by scalar leptoquarks which couple to the left-handed quarks. For a coupling of electromagnetic strength, the leptoquark mass is inferred to be 1.1 to 1.3 TeV. We also show that these solutions are consistent with all other low-energy and high-energy neutral-current data. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：149 / 154

页数：6

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