Search for new phenomena in low-mass dijet using trigger-level analysis

Abstract: The recent upgrade of the Large Hadron Collider (LHC) benefits searches for new physics phenomena using multijet final states. The increased center-of-mass energy opens new possibilities to probe new physics at scales beyond the Tera-electron volt (TeV), especially in di-jet final states. However, in the sub-TeV mass region, the QCD background to dijet searches is overwhelming and not all events can be fully recorded. Due to the limited bandwidth available for offline storage, the rates of recording events have to be kept under control. This bandwidth limitation could be addressed by recording partial events, reducing the event size drastically. In order to use these partial events, recorded within the High Level Trigger (HLT) system in a search for new physics, a new dedicated calibration scheme needs to be developed. This thesis describes the data-driven in-situ pseudorapidity intercalibration for HLT jets that is necessary for such a search.