Physics (Internal)

Aspects of Goldstini

This event is part of the HET Seminar Series.

Abstract:
Supersymmetric phenomenology has been largely bound to the hypothesis that supersymmetry breaking originates from a single source. However, if there is a multiplicity of sectors which independently break supersymmetry, then there is a corresponding multiplicity of goldstini. While one linear combination of goldstini is eaten by the gravitino via the super-Higgs mechanism, the orthogonal combinations remain in the spectrum as physical degrees of freedom. These goldstini can have a dramatic impact on cosmology and collider phenomenology. In this talk, I report on a number of interesting goldstini possibilities, including modifications to big bang nucleosynthesis and enhanced Higgs production rates at the LHC. I will also discuss a new way to do supergravity calculations via a modified conformal compensator, which clarifies some otherwise confusing results in the goldstini spectrum.