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题名: Implications of LEP and SLD data for new physics in Zb(b)over-bar couplings
作者: Oakes, RJ ;  Yang, JM ;  Young, BL
刊名: PHYSICAL REVIEW D
出版日期: 2000
卷号: 61, 期号:7, 页码:-
关键词: TOP-QUARK PRODUCTION ;  PARITY-VIOLATING SUPERSYMMETRY ;  W-GLUON FUSION ;  FERMILAB-TEVATRON ;  R-PARITY ;  STANDARD MODEL ;  YUKAWA CORRECTIONS ;  3RD-FAMILY QUARKS ;  Z-RESONANCE ;  Z-DECAYS
学科分类: Physics
通讯作者: Oakes, RJ , Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
部门归属: Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA; Tohoku Univ, Dept Phys, Aoba Ku, Sendai, Miyagi 9808578, Japan; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China; Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
英文摘要: The combined CERN LEP and SLAC Large Detector (SLD) data on the b,(b) over bar forward-backward asymmetry from the Z-pole measurements may imply the presence of new physics in the Zb (b) over bar couplings. In general, the effect of new physics can be parametrized by SUC(3) x SUL(2) x U-Y(1) invariant higher dimensional operators. By fitting the recently announced LEP and SLD data on A(b) and R-b, the size of the coupling strengths of these operators can be determined. We also found that the new physics operators can be divided into two types, depending on their Higgs field content. The ones involving the Higgs field have very mild effects at higher energy colliders, while the other type which do not contain the Higgs field can show significantly large effects on b (b) over bar production at LEP II, t (t) over bar production at the NLC and single top quark production at the Fermilab Tevatron. The preliminary data from the LEP II measurements disfavor the second type of operators.
收录类别: SCI
WOS记录号: WOS:000086065200076
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12993
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:
Oakes, RJ,Yang, JM,Young, BL. Implications of LEP and SLD data for new physics in Zb(b)over-bar couplings[J]. PHYSICAL REVIEW D,2000,61(7):-.
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