Calibration processes for photon–photon colliders

Exclusive Processes at Colliders

Up to now the investigations at high energies were concentrated on inclusive processes, i.e. processes (measurements) when only one object of many produced simultaneously is recorded. Naively, these processes seem to be difficult but can be well described within the standard parton model. The exclusive processes seems naively easier, but in reality require detailed knowledge of the QCD dynamics...

Triple Vector Boson Processes in γγ Colliders

We study the production of three gauge bosons at the next generation of linear ee colliders operating in the γγ mode. The processes γγ → WWV (V = Z, or γ) can provide direct information about the quartic gauge-boson couplings. We analyze the total cross section as well as several dynamical distributions of the final state particles including the effect of kinematical cuts. We find out that a li...

The equivalent photon approximation for coherent processes at colliders

We consider coherent electromagnetic processes for colliders with short bunches, in particular the coherent bremsstrahlung (CBS). CBS is the radiation of one bunch particles in the collective field of the oncoming bunch. It can be a potential tool for optimizing collisions and for measuring beam parameters. A new simple and transparent method to calculate CBS is presented based on the equivalen...

Quantum Effects in Higgs-Boson Production Processes at Hadron Colliders

Radiation zeros in weak boson production processes at hadron colliders

The Standard Model amplitudes for processes where one or more gauge bosons are emitted exhibit zeros in the angular distributions. The theoretical and experimental aspects of these radiation amplitude zeros are reviewed and some recent results are discussed. In particular, the zeros of the WZγ and WZZ production amplitudes are analyzed. It is briefly explained how radiation zeros can be used to...