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The Spectrum of Goldstini and Modulini · Around

2011

The Spectrum of Goldstini and Modulini

Cheung, Clifford, D'Eramo, Francesco, Thaler, Jesse

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When supersymmetry is broken in multiple sectors via independent dynamics, the theory furnishes a corresponding multiplicity of "goldstini" degrees of freedom which may play a substantial role in collider phenomenology and cosmology.

In this paper, we explore the tree-level mass spectrum of goldstini arising from a general admixture of F-term, D-term, and almost no-scale supersymmetry breaking, employing non-linear superfields and a novel gauge fixing for supergravity discussed in a companion paper.
In theories of F-term and D-term breaking, goldstini acquire a mass which is precisely twice the gravitino mass, while the inclusion of no-scale breaking renders one of these modes, the modulino, massless.
We argue that the vanishing modulino mass can be explained in terms of an accidental and spontaneously broken "global" supersymmetry.

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