Reference processes

Machine parameters - Basic Standard Model - W pairs - Top quark - Higgs - SUSY - Two-photon physics -
Links to other LC web pages

The content of this page was defined at the Lund meeting June 28-30.

One of the objectives of the current linear collider workshop is to establish a list of reference processes. These processes, motivated from the physics point of view, have been selected to test the performance of a detector design from complementary aspects at the high TESLA luminosity of 5.1034cm-2s-1. The list is minimal but comprehensive enough to cover all interesting signatures that one might expect, and to allow reasonable extrapolations to "the unexpected".

The list is not to be viewed as a complete list of "all" interesting physics processes at a linear collider. The physics case contains a wealth of further processes, and a wide parameter space to be explored, as evident e.g. for supersymmetry. All of this will be covered in the physics section of the final report which will extend the Physics Chapter of the CDR (DESY 1997-048, ECFA 1997-182) // Phys. Rep. 299 (1998) 1 (hep-ph/9705442).

Machine parameters

To be used as common guidelines unless otherwise specified.

Basic standard model process: Bhabha scattering

W pairs

W pair production has a very large cross section and will therefore be important both as signal and background process.

Top quark

Top production will be studied in dedicated threshold runs and at high energies. This process will form a major background to final states of new physics reactions involving multijets and WW pairs.

Higgs (SM and extended)

The detection of the SM Higgs boson will obviously be given high priority. A study of Higgs properties can also be used to test the MSSM scenario and other possible extensions of the SM.


Supersymmetry is a broad area, that covers many processes and a large parameter space. It is therefore necessary to be rather restrictive.

Two-photon physics

Some gamma-gamma reactions are interesting in their own right, but they can also form an important background to other processes.