Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-25
Phys.Rev.D83:034024,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
Version in PRD (figs updated and discussions added)
Scientific paper
10.1103/PhysRevD.83.034024
Extensions of the Standard Model often predict new chiral interactions for top quark, which will contribute to top quark spin correlation and polarization in $t\bar{t}$ 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 (RPV-MSSM), 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 RPV-MSSM with $\lambda"$ couplings.
Cao Junjie
Wu Lei
Yang Jin Min
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