Search for Dijet Mass Resonance Using Trigger-Level-Analysis in Proton Proton Collision at center of mass energy of 13 TeV with the ATLAS Detector

This work presents a search for a dijet mass resonance using Trigger-Level-Analysis in proton-proton collisions at Dijet searches in ATLAS with sub-TeV masses are statistically limited by the available bandwidth for inclusive jet triggers. The high Standard Model production rate of jets require ATLAS to apply prescale factors on these triggers in order to record full events in a manageable rate. The Trigger- Level-Analysis introduces a new strategy to overcome these limitations; By recording events in a reduced data format, which include only the subset of information necessary for a resonance search, it’s possible to record events at much higher rates. The search described in this work considers dijet masses between 394 GeV - 1.24 TeV and uses 3.4 /fb of data collected during 2015. The data shows agreement with the prediction from the Standard Model, and exclusion limits on possible models were set.