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Ghost fields in CompHEP

CompHEP  constructs a list of quantum fields according to the Table of particles described above. Besides of names enumerated in this table CompHEP  generates auxiliary fields, for example, the Faddeev-Popov ghosts [Bjorken&Drell]. We use the name ghost for all of them.

The ghost fields do not correspond to physical degrees of freedom, but each of them has some real particle as a prototype. The names of ghost fields are constructed by CompHEP  from the prototype particle name followed by a suffix which specify a type of ghost. The particle name and the suffix are separated by the dot symbol. It is assumed that the ghost fields explicitly appear in the vertices of interactions together with real particle fields and thus contribute to the particle interaction. Below we list CompHEP  ghost fields.