Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints? -: art. no. 111802

被引：32

作者：

Cao, JJ

Xiong, ZH

Yang, JM

机构：

[1] CCAST, World Lab, Beijing 100080, Peoples R China

[2] Henan Normal Univ, Dept Phys, Xinxiang 453002, Henan, Peoples R China

[3] Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.88.111802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In the framework of the minimal supersymmetric model we examine the Z-peak constraints on the scenario of one light bottom squark (sbottom) (similar to2-5.5 GeV) and light gluino (similar to12-16 GeV) which has been successfully used to explain the excess of bottom quark production in hadron collisions. Such a scenario is found to be severely constrained by the CERN LEP Z-peak observables, especially by R-b, due to the large effect of gluino-sbottom loops. To account for the Rb data in this scenario, the other mass eigenstate of sbottom, i.e., the heavier one, must be lighter than 125 ( 195) GeV at 2sigma(3sigma) level, which, however, is disfavored by CERN LEP II experiments.

引用

页数：4

共 30 条

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