Seminarium Teorii Oddziaływań Elementarnych

n this talk I will discuss top-quark polarisation as a probe to study BSMphysics at the colliders. As an example I will discuss how top polarisationcan provide discrimination, both at the Tevatron and at the LHC,among the different BSM explanations for the forward backward top asymmetryobserved at the Tevatron. I will mention briefly other probes fordistinguishing among them at the Tevatron and the LHC. I will then talk aboutdifferent probes of top polarisation and the effect of BSM physics on them.