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Several extended supersymmetric models, motivated by either grandunification, or by neutrino mass generation, predict light doubly chargedhiggsinos. We study the production of a single doubly charged higgsino and itsdecay channels at the International Linear Collider (ILC) operating in the e-e-mode. We analyze the production cross section for e-e- -->tilde{Delta}^{--}_{L,R} chi^0_1 as a function of different kinematic variables,followed by the decay, through several channels, of the doubly charged higgsinointo a final state of two leptons plus missing energy. We include the standardmodel background and discuss how kinematic cuts could be used effectively tolimit this background. Single production of these exotics could provide aspectacular signal for a new underlying symmetry and for physics beyond theminimal supersymmetric standard model.

Single Production of Doubly Charged Higgsinos at linear e-e- colliders