Light bottom squark and gluino confront electroweak precision measurements

被引：16
|
作者：
Cho, GC [1 ]
机构：
[1] Ochanomizu Univ, Dept Phys, Tokyo 1128610, Japan
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.89.091801
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We address the compatibility of a light sbottom (mass similar to2-5.5 GeV) and a light gluino (mass similar to12-16 GeV) with electroweak precision measurements. Such light particles have been suggested to explain the observed excess in the b quark production cross section at the Tevatron. The electroweak observables may be affected by the sbottom and gluino through the supersymmetric-QCD (SUSY-QCD) corrections to the Zbb vertex. We examine, in addition to the SUSY-QCD corrections, the gauge boson propagator corrections from the stop which are allowed to be light from the SU(2)(L) symmetry. We find that this scenario is strongly disfavored from electroweak precision measurements.
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页数：4
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