Light third-generation squarks from flavour gauge messengers
Date
2014-04-10
Authors
Brummer, Felix
McGarrie, Moritz
Weiler, Andreas
Journal Title
Journal ISSN
Volume Title
Publisher
Springer
Abstract
We study models of gauge-mediated supersymmetry breaking with a gauged horizontal SU(3)F symmetry acting on the quark superfields. If SU(3)F is broken nonsupersymmetrically by F -term vacuum expectation values, the massive gauge bosons and gauginos become messengers for SUSY breaking mediation. These gauge messenger fields induce a flavour-dependent, negative contribution to the soft masses of the squarks at one loop. In combination with the soft terms from standard gauge mediation, one obtains large and degenerate first- and second-generation squark masses, while the stops and sbottoms are light. We discuss the implications of this mechanism for the superparticle spectrum and for flavour precision observables. We also provide an explicit realization in a model with simultaneous SUSY and SU(3)F breaking.
Description
Keywords
Research Subject Categories::NATURAL SCIENCES::Physics, Supersymmetric Standard Model, Supersymmetry Breaking, Beyond Standard Model