Browsing by Author "Mariotti, Alberto"

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    Unscreening the Gaugino Mass with Chiral Messengers
    (2010-07-23T10:33:51Z) Argurio, Riccardo; Bertolini, Matteo; Ferretti, Gabriele; Mariotti, Alberto; Physics; Elementary Particle Theory
    Gaugino screening, the absence of next-to-leading order corrections to gaugino masses, is a generic feature of gauge mediation models of supersymmetry breaking. We show that in a specific class of models, known as semi-direct gauge mediation, it is possible to avoid gaugino screening by allowing for a chiral messenger sector. Messengers then acquire a mass at some scale, for instance by higgsing or by some auxiliary strong coupling dynamics. We implement this idea in a simple model which we work out explicitly.