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曹俊杰

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期刊论文

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

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Phys. Rev. D,2011,83(3):034024 | 2011年02月22日 | https://doi.org/10.1103/PhysRevD.83.034024

URL:https://journals.aps.org/prd/abstract/10.1103/PhysRevD.83.034024

摘要/描述

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 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 λ'' couplings.

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