In this work, the impact of electroweak (EW) contributions on the cross sections for the top-quark pair production within the Standard Model (SM) and for the top-squark pair production within the Minimal Supersymmetric Standard Model (MSSM) is investigated. For these processes, the EW-QCD interference leads to additional contributions which are not present at Born-level. In addition, parton densities at next-to-leading-order (NLO) in QED give rise to non-zero photon density in the proton. It is shown that the size of photon-induced production rates is comparable to other EW NLO contributions. The cross sections differential in invariant mass and transverse momentum of final state particles are studied and discussed in kinematic ranges accessible at the LHC and at the Tevatron. The NLO EW contributions become significant at high transverse momentum and high invariant mass and should be included in the numerical analysis.
«
In this work, the impact of electroweak (EW) contributions on the cross sections for the top-quark pair production within the Standard Model (SM) and for the top-squark pair production within the Minimal Supersymmetric Standard Model (MSSM) is investigated. For these processes, the EW-QCD interference leads to additional contributions which are not present at Born-level. In addition, parton densities at next-to-leading-order (NLO) in QED give rise to non-zero photon density in the proton. It is...
»