HIGHER-ORDER CORRECTIONS TO JET CROSS-SECTIONS IN HADRON COLLIDERS

We describe a general method of calculating the fully differential cro ss section for the production of jets at next-to-leading order in a ha dron collider. This method is based on a ''crossing'' of next-to-leadi ng order calculations with all partons in the final state. The method introduces universal crossing functions that allow a modular approach to next-to-leading order calculations for any process with initial sta te partons. These techniques are applied to the production of jets in association with a vector boson including all decay correlations of th e final state observables.