Determining the parameters of the Minimal Supergravity Model from final states at LHC.

We analyse the events with two same‐flavour, opposite‐sign leptons + + (jets) as expected in collisions at LHC within the framework of the minimal Supergravity Model. The objective is the determination of the parameters and of this model (for a given value of ). The signature + (jets) selects the leptonic decays of , , . We exploit the fact that the invariant dilepton mass distribution has a pronounced structure with a sharp edge at the kinematical endpoint even in such an inclusive final state over a significant part of parameter space. We determine the domain of parameter space where the edge is expected to be visible. We show that a measurement of this edge already constrains the model parameters essentially to three lines in the ( ) parameter plane. We work out a strategy to discriminate between the three‐body leptonic decays of and the decays into sleptons . This procedure may make it possible to get information on SUSY particle masses already with low luminosity, pb .