Triggering on emerging jets

Confining dark sectors at the GeV scale can lead to novel collider signatures including those termed emerging jets with large numbers of displaced vertices. The triggers LHC experiments were not designed this type new physics in mind, and triggering be challenging, especially if mediator is relatively light and/or has quantum such that additional are automatically produced each event. We show efficiency total event rate current significantly improved by considering initial state radiation events, largest increase coming from simulation two jets. also explore possible employ hit counts different tracker layers as input into a machine learning algorithm. these have reasonably low background rates, they sensitive wide range parameters even when trained on single model.