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arXiv · 1701.05900

Single top polarisation as a window to new physics

J. A. Aguilar-Saavedra·C. Degrande·S. Khatibi
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Abstract

We discuss the effect of heavy new physics, parameterised in terms of four-fermion operators, in the polarisation of single top (anti-)quarks in the $t$-channel process at the LHC. It is found that for operators involving a right-handed top quark field the relative effect on the longitudinal polarisation is twice larger than the relative effect on the total cross section. This enhanced dependence on possible four-fermion contributions makes the polarisation measurements specially interesting, in particular at high momenta.

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J. A. Aguilar-Saavedra, C. Degrande, S. Khatibi. 2017-04-15. Single top polarisation as a window to new physics. https://doi.org/10.1016/j.physletb.2017.04.023

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