e ⁺ e ⁻ γ production at photon-photon colliders at complete electroweak NLO accuracy *

Sfermion production at photon colliders

We calculate total and differential cross sections for sfermion production in e+e− annihilation and in photon-photon collisions with arbitrary photon polarization. The total cross section at a polarized photon collider is shown to be larger than the e+e− annihilation cross section up to the kinematic limit of the photon collider.

J / ψ production through resolved photon processes at e + e − colliders

NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders

We present the complete two-loop electroweak corrections to gg → H, the main partonic channel for the production of the Higgs boson at hadron colliders. The evaluation is based on a numerical approach and the result covers all kinematical regions, including WW and ZZ thresholds, by introducing complex masses for the W and the Z bosons. Furthermore the relation between physical observables measu...

NLO electroweak contributions to gluino pair production at hadron colliders

We calculate the full O(αsα) corrections to the process of gluino pair production at hadron colliders in the framework of the real MSSM. We show that these contributions can be neglected at the LHC performing a scan over a wide region of the parameter space. The impact of these corrections in the parameter range investigated at the Tevatron is small.

Double J/ψ Production at Photon Colliders

The double Charmonium production at direct photon-photon colliders is investigated. We find that the production rate of the process is of the same order of magnitude as those of previous discussed ones in the full energy span of LEP II to next generation Linear Colliders, and it can not be covered only by the fragmentation scheme. As it has a clear distinction in the final state from others, th...