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题名: Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints?
作者: Cao, JJ ;  Xiong, ZH ;  Yang, JM
刊名: PHYSICAL REVIEW LETTERS
出版日期: 2002
卷号: 88, 期号:11, 页码:-
关键词: PRODUCTION CROSS-SECTION ;  = 1.8 TEV ;  P(P)OVER-BAR COLLISIONS ;  ROOT-S=1.8 TEV ;  Z-DECAYS ;  QUARK ;  B(B)OVER-BAR ;  SCENARIO ;  PHYSICS
学科分类: Physics
通讯作者: Cao, JJ , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
部门归属: CCAST, World Lab, Beijing 100080, Peoples R China; Henan Normal Univ, Dept Phys, Xinxiang 453002, Henan, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000174541700007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13564
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Cao, JJ,Xiong, ZH,Yang, JM. Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints?[J]. PHYSICAL REVIEW LETTERS,2002,88(11):-.
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