Search for the Next-To-Lightest Neutralino

We study the inclusive production of the next-to-lightest neutralino decaying directly, or via slepton, into two leptons and the lightest neutralino. Events are selected in the inclusive 3 lepton or 3 lepton + ET missing final states. The study is carried out in the framework of the minimal SUGRA model with one set of parameters: tan( beta)=2, A0=0, mu<0. The region of ( m0, m1/2) parameter space, where the next-to-lightest neutralino is observable by the characteristic shape of the dilepton invariant mass spectrum, is delineated. The possibilities to determine the model parameters through the measurement of neutralinos and slepton masses are discussed.