Speaker
Description
We present here a search for semi-visible jets (SVJs) arising from a QCD-like dark sector in ATLAS data. The signal model used predicts a heavy leptophobic Z' mediator and we consider a resonant production via an s-channel. The Z' promptly decays to two dark quarks, which hadronise into both standard model and dark matter particles generating SVJs in our final states. The search for SVJs is conducted using neural networks that create event representations of observables from jet associated tracks to identify the underlying differences between standard model and dark matter hadronisation. The resonant search is performed by fitting the transverse mass distribution. No significant excess was observed, results are presented as limits on the cross section of the Z’ mediator, where signals are parameterised by the mass of the Z’ and the relative amount of dark and visible final state matter in the jets.