Final Technical Report: New Physics in Higgs or Higgsinos Using Vector Boson Fusion, Missing Energy, and ATLAS Trigger System Upgrades

The grant DE-SC0018007 supported Tae Min Hong and his research group at the University of Pittsburgh over a period of nine months leading up to his inclusion in Pittsburgh's group grant DE-SC0007914. The work was done at the ATLAS Experiment at the Large Hadron Collider at CERN. Hong and his group supported the operations of the trigger subsystem, the upcoming upgrade of the level-1 calorimeter trigger subsystem, and the analysis of data collected by the detector. The analysis focused on the invisible decays of the Higgs boson and the compressed scenario in supersymmetry, both in the vector boson fusion mode of the colliding protons. This is part of a broad program of whether the Higgs boson is in agreement with the Standard Model expectations and whether new spacetime symmetries such as supersymmetry exists.