Doubly charged Higgsino pair production and decays in e+ e- collisions

In supersymmetric grand unified theories, light higgsino multiplets generally exist in addition to the familiar chargino/neutralino multiplets of the minimal supersymmetric extension of the Standard Model. The new multiplets may include doubly charged states

\tilde\Delta^{\pm\pm}

and

\tilde\delta^{\pm\pm}

. We study the properties and the production channels of these novel higgsinos in

e^+e^-

and

\gamma\gamma

collisions, and investigate how their properties can be analyzed experimentally.

electron positron: annihilation
electron: polarized beam
grand unified theory
supersymmetry
sparticle: electroproduction
sparticle: decay
Higgsino: pair production
charge: 2
effective Lagrangian
Feynman graph

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