Reducing Errors in Lepton Jet Reconstruction

Currently, the most accurate model at describing observations in particle physics is the Standard Model. However, there are many phenomena that it fails to explain, such as dark matter: an unknown type of matter detectable only by its gravitational effect on regular matter. One explanation is that it is made of many different undiscovered dark matter particles in a "dark sector." This dark sector doesn't interact with regular matter directly- instead, "portal matter" mediates the interaction. One such particle theorized to be in the dark sector is the dark photon, which is similar to the regular photon. However, the dark photon can decay into portal matter, which then produces lepton jets. If dark photons are produced in the Large Hadron Collider, these lepton jets can be detected. Once they are detected, they need to be identified as leptons in a process called reconstruction. We work on identifying and resolving errors within our current methods of lepton jet reconstruction.