New physics effects on top quark spin correlation and polarization at the LHC: a comparative study in different models
New physics effects on top quark spin correlation and polarization at the LHC: a comparative study in different models
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DOI：
10.1103/physrevd.83.034024
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发表时间：
2010-11
影响因子：
5
通讯作者：
Junjie Cao;Lei Wu;Jin Min Yang
中科院分区：
文献类型：
--
作者：
Junjie Cao;Lei Wu;Jin Min Yang
标准模型的扩展通常预测了顶夸克的新手征相互作用，这将有助于在LHC的棒产生上的t（t）中的顶夸克自旋相关和极化。本文在现有Tevatron测量的约束条件下，比较研究了三种新的物理模型：无R宇称的最小超对称模型、第三代增强左右模型和轴胶子模型的自旋相关和极化.我们发现，在所有这些模型中，极化不对称性都可以被增强到可以达到的水平，而在轴胶子模型和无R宇称的最小超对称模型中，自旋关联的修正可以被检测到.
Extensions of the standard model often predict new chiral interactions for top quarks, which will contribute to top quark spin correlation and polarization in t (t) over bar production at the LHC. In this work, under the constraints from the current Tevatron measurements, a comparative study of the spin correlation and polarization is performed in three new physics models: the minimal supersymmetric model without R-parity, the third-generation enhanced left-right model, and the axigluon model. We find that the polarization asymmetry may be enhanced to the accessible level in all these models, while the correction to the spin correlation may be detectable in the axigluon model and the minimal supersymmetric model without R-parity with lambda '' couplings.