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Implications of LEP and SLD data for new physics in Zb(b)over-bar couplings
Oakes, RJ; Yang, JM; Young, BL; Oakes, RJ , Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
2000
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号61期号:7页码:-
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.
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
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
学科领域Physics
收录类别SCI
WOS记录号WOS:000086065200076
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12993
专题理论物理所1978-2010年知识产出
通讯作者Oakes, RJ , Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA.
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Oakes, RJ,Yang, JM,Young, BL,et al. Implications of LEP and SLD data for new physics in Zb(b)over-bar couplings[J]. PHYSICAL REVIEW D,2000,61(7):-.
APA Oakes, RJ,Yang, JM,Young, BL,&Oakes, RJ , Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA..(2000).Implications of LEP and SLD data for new physics in Zb(b)over-bar couplings.PHYSICAL REVIEW D,61(7),-.
MLA Oakes, RJ,et al."Implications of LEP and SLD data for new physics in Zb(b)over-bar couplings".PHYSICAL REVIEW D 61.7(2000):-.
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