One loop cross-section for q qbar to H gamma

This thesis consists of two parts; in Part I are discussed all formal results which are needed for a coherent calculation of one-loop level Standard Model diagrams. In Part II the actual calculation is carried out for the process q qbar to H gamma, with an emphasis on the procedures used for the generation and treatment of the diagrams. A comprehensive list of all necessary loop functions is also presented at the end of Part II.