Concepts for leptoquark search at Hera

This thesis project is devoted to concepts which enable a search for leptoquarks. In view of the large background for these particles, two main aspects are considered: The detailed simulation of so many events is very time consuming. Therefore, a new and very fast monte carlo program for the H1 detector was developed. The analysis of presumably rare processes requires a very efficient rejection of background events. For this, a constrained kinematic fit is suggested, which leads to an optimum reconstruction of the leptoquark mass and allows additional cross checks on event interpretations. (orig.)