Analysis of Efficiency of Dark Photon Decay to Lepton Jets

Dark photons are useful indicators to explain important phenomena beyond the Standard Model of particle physics, namely in the context of many experiments: dark matter. Dark photons can interact with Standard Model particles through a process called kinetic mixing, which allows them to decay into Standard Model leptons, from which lepton jets are produced. The area of interest in these jets comes in the form of analysis of the varying-flavor pairs in the jets. If the given pair in a lepton jet has two particles of different flavor, this observation can offer evidence for possible connections to show relative probabilities of correct-flavor and wrong-flavor decays, which can be used to test theoretical models of particle interactions. Ratios of wrong-flavor to total pairs, and correct pairs are also important relevant measures. These results can be used to search for new particles or phenomena beyond the Standard Model of particle physics. Another important thing to note, is the facet of measurement itself: we are measuring in data, in contrast to Monte Carlo, as Monte Carlo is not reliable when looking at only very rare cases, and data-driven estimates can be preferable. In summary, we discuss the discovery process of rates of fake lepton jets, by using indicators in the form of different-flavor pairs. These pairs cannot occur in any known Standard Model or beyond process so they are good indicators of these fake jets, therefore giving the inference that they were formed by luck, the rate of which is what we are interested in.