A NEW HEAVY FLAVOR GENERATOR IN E-P COLLISIONS

The reaction of boson-gluon fusion V*g --> QQBAR' has been implemented in the framework of the QCD inspired Monte Carlo, HERWIG, and results have been obtained for the energy of HERA, the e-p collider at DESY. The backward evolution of the initial gluon leg, as well as the coherence in timelike and spacelike parton cascades, can both be described in HERWIG. The new implementation consistently shows differences at the level of the parton shower and the fragmented hadrons in comparison with the previous boson-gluon fusion generator, AROMA, from the Lund package. The program, namely HARHEA, will be available within the next releases of the HERWIG Monte Carlo.