Monophoton signals in light gravitino production at $e^{+}{e}^{-}$ colliders

Kentarou Mawatari, Bettina Oexl

We revisit the monophoton plus missing energy signature at $e^{+}{e}^{-}$ colliders in supersymmetric (SUSY) models where the gravitino is very light. There are two possible processes wh…