Probing top-antitop resonances with t t ¯ $$ t\overline{t} $$ scattering at LHC14

Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC

We perform a model-independent study for top-antitop and top-top resonances in the dilepton channel at the Large Hadtron Collider. In this channel, we can solve the kinematic system to obtain the momenta of all particles including the two neutrinos, and hence the resonance mass and spin. For discovering top-antitop resonances, the dilepton channel is competitive to the semileptonic channel beca...

The Top-Antitop Threshold at Muon Colliders

Muon colliders are expected to naturally have a small spread in beam energy making them an ideal place to study the excitation curve. We present the parameter determinations that are possible from measuring the total cross section near threshold at a μμ collider.

MSSM Effects in Top - antitop Production at the LHC

We report on a calculation of the effects of supersymmetry on the cross-section for t− t̄ production at LHC. A numerical study is carried out for the ten benchmarks of the Snowmass accord. It is found that the higher order effects involving supersymmetric particles in internal loops can be as high as 6%, both for the cross-section and the (parity even) helicity asymmetry, for one particular benc...

Z ′ signals in polarised top - antitop final states at the

We study the sensitivity of top pair production at the Large Hadron Collider (LHC) to the nature of an underlying Z′ boson, including full tree level standard model background effects and interferences while assuming realistic final state reconstruction efficiencies. We demonstrate that exploiting asymmetry observables represents a promising way to distinguish between a selection of benchmark Z...

Two-Loop Corrections to Top-Antitop Production at Hadron Colliders