Higgs decay to goldstini and its observability at the LHC

Understand

If supersymmetry is broken independently in multiple sectors with different scales, a number of goldstinos will be generated.

• One linear combination of these goldstinos is massless and eaten by the gravitino, while the orthogonal combinations acquire a tree level mass and become the physical states named goldstini (G').
• Compared to the gravitino, such goldstini could couple more strongly to the visible fields and lead to some exotic phenomenology.
• In this note we first check the goldstini couplings in some GMSB models and find that the goldstini-photon-neutralino interaction may be very small while the goldstini-Z-neutralino and goldstini-Higgs-neutralino interactions may be sizable.