University of Tarapaca and Millennium Institute for Subatomic Physics at the High-Energy Frontier (SAPHIR)
Wednesday, October 6, 2021
In recent years at the Large Hadron Collider (LHC), new strategies have appeared to search for new physics related to Dark Matter (DM) by studying exotic long-lived particles (LLP) that would leave distinguishable signatures in detectors. In this context, since the next data-taking period (Run-3) is expected to reach an integrated luminosity no more than two times the one achieved in the last period, many new LLP searches have appeared. Dark/Hidden sector models, which propose a dark sector that is very weakly coupled to known particles, stand out offering particulary interesting signatures. This talk will cover searches for long-lived dark photons mediated by a Higgs boson that decays into displaced collimated fermions with the ATLAS detector. I will give a summary of the latest ATLAS results using 2015-2016 event statistics, follow by the new publication strategy, concentrating in the new vector-boson-fusion (VBF) machine learning classification.
J. Pedro Ochoa Ricoux