MSSM Effects in Top-antitop Production at the LHC

Understand

We report on a calculation of the effects of supersymmetry on the cross-section for top-antitop 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 benchmark.
• For other benchmarks smaller but nonetheless observable corrections are found.