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New physics effects on top quark spin correlation and polarization at the LHC: A comparative study in different models

Abstracts

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.
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Journal:PHYSICAL REVIEW D
Recommended references: Cao, Junjie,Wu, Lei,Yang, Jin Min.(2016).New physics effects on top quark spin correlation and polarization at the LHC: A comparative study in different models.PHYSICAL REVIEW D.[ChinaXiv:201605.01718] (Click&Copy)
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[V1] 2016-05-14 10:34:15 chinaXiv:201605.01718V1 Download
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