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

TL;DR

This paper investigates the potential to produce and detect doubly charged higgsinos singly at the ILC in e-e- collisions, analyzing cross sections, decay channels, and background suppression to identify signals of new physics beyond the MSSM.

Contribution

It presents the first detailed study of single production and decay of doubly charged higgsinos at linear colliders, highlighting their potential as signals of extended supersymmetric models.

Findings

Production cross section depends on kinematic variables.

Decay channels produce leptons plus missing energy.

Kinematic cuts can effectively reduce standard model background.

Abstract

Several extended supersymmetric models, motivated by either grand unification, or by neutrino mass generation, predict light doubly charged higgsinos. We study the production of a single doubly charged higgsino and its decay 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 higgsino into a final state of two leptons plus missing energy. We include the standard model background and discuss how kinematic cuts could be used effectively to limit this background. Single production of these exotics could provide a spectacular signal for a new underlying symmetry and for physics beyond the minimal supersymmetric standard model.