Multiphoton Signatures of Multisector Gauge Mediation

We report on a study of models of gauge mediation with multiple hidden sectors. In such models, the neutralino sector is augmented with an additional pseudo- goldstino for each sector. This leads to modified decay chains with extra photons in the final state. In the case where the lightest ordinary SUSY particle is a Bino, this gives rise to multiphoton plus missing energy signatures at the LHC. We present the number of signal events expected in the case of slepton pair production in both RUN 1 and in the current 2015 data sample, as well as a preliminary, Montecarlo based, estimate of the background. Our conclusion is that a targeted multiphoton plus MET search would be quite sensitive to this type of models already with the present data