Sgoldstino Signal at FASER: Prospects in Searches for Supersymmetry

Abstract We investigate FASER@LHC perspectives in searches for light (0.1–5 GeV) sgoldstinos in models with low energy (10–104 TeV) supersymmetry breaking. We consider flavor conserving and flavor violating couplings of sgoldstinos to Standard Model fermions and find the both options to be testable at FASER. Even the first FASER run allows one to probe interesting patches in the model parameter space, while the second run, FASER-II, with significantly larger detector fiducial volume, gives a possibility to thoroughly explore a wide class of supersymmetric extensions of particle physics complementary to those probed at LHC with ATLAS and CMS detectors.