Ariadne

Ariadne is a Monte Carlo parton shower generator. It was the first parton shower program that formulated parton splitting not in terms of partons (except for the splitting of a gluon to a quark-antiquark pair), but in terms of colour dipoles, each connecting a quark-antiquark pair. As such, it is the original dipole shower program.

The Ariadne project in a wider sense also includes the HEJ and Dipsy event generators, as well as the rope hadronisation model for describing hadron formation in environments where there is a high colour charge density (such as a heavy ion collision).