Process Selection

By default all processes are switched off. You should switch on those you want to simulate. This may be done at two levels, either for each individual process or for a group of processes. That is, a process is going to be generated either if its own flag or its group flag is on. There is no built-in construction to switch on a group and then switch off a few of its members.

Each process is assigned an integer code. This code is not used in the internal administration of events (so having the same code for two completely different processes would not be a problem), but only intended to allow a simpler user separation of different processes. Also the process name is available, as a string.

To ease navigation, the list of processes has been split into several separate pages, by main topic. The classification is hopefully intuitive, but by no means unambiguous. For instance, essentially all processes involve QCD, so the "QCD processes" are the ones that only involve QCD. (And also that is not completely true, once one includes all that may happen in multiple interactions.) On these separate pages also appear the settings that are completely local to that particular process class, but not the ones that have a broader usage.

QCD Processes

QCD processes fall in two main categories: soft and hard. The soft ones contain elastic, diffractive and "minimum-bias" events, together covering the total cross section. Hard processea are the normal 2 -> 2 ones, including charm and bottom production.

Electroweak Processes

Prompt-photon, gamma^*/Z^0 and W^+- production, plus a few processes with t-channel boson exchange.

Top Processes

Top production, singly or doubly.

Onia Processes

Colour singlet and octet production of charmonium and bottomonium.

SUSY Processes

Production of supersymmetric particles.