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Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints?
Cao, JJ; Xiong, ZH; Yang, JM; Cao, JJ , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
2002
发表期刊PHYSICAL REVIEW LETTERS
ISSN0031-9007
卷号88期号:11页码:-
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.
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
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
学科领域Physics
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收录类别SCI
WOS记录号WOS:000174541700007
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13564
专题理论物理所SCI论文
通讯作者Cao, JJ , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China.
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Cao, JJ,Xiong, ZH,Yang, JM,et al. Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints?[J]. PHYSICAL REVIEW LETTERS,2002,88(11):-.
APA Cao, JJ,Xiong, ZH,Yang, JM,&Cao, JJ , CCAST, World Lab, POB 8730, Beijing 100080, Peoples R China..(2002).Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints?.PHYSICAL REVIEW LETTERS,88(11),-.
MLA Cao, JJ,et al."Can the minimal supersymmetric standard model with light bottom squark and light gluino survive Z-peak constraints?".PHYSICAL REVIEW LETTERS 88.11(2002):-.
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