The ATLAS detector studies proton-proton collisions at a center of mass energy of 14 TeV, seven times higher than previous facilities. We have discovered the Higgs boson in 2012 and are constantly searching for new forms of matter such as supersymmetric states. The lighest supersymmetric state is a prime candidate for the dark matter and supersymmetry is an essential ingredient of many attractive theories.

This detector is now in operation at CERN's Large Hadron Collider (LHC). Since 2010 it has been operating at a center of mass energy of 7 TeV (2010-2011), 8 TeV (2012) and 13 TeV (2015-present). The Chicago group built much of the readout electronics for the hadron calorimeter (TileCal). The group is also currently involved in preparing upgrades to the trigger system used to identify interesting interactions to be recorded, including a new hardware-based track trigger (FTK), and a new hardware-based calorimeter trigger (gFEX). The group is heavily involved in analysing the data taken by the experiment.

The Chicago group consists of five faculty members (Kim, Miller, Oreglia, Shochet, Pilcher) together with research personnel and students. Many of the members of the group are in full time residence at CERN, with the rest in Chicago. The physics analysis of the group is supported by a powerful computing facility which includes an ATLAS Tier 3 computing system dedicated to Chicago physicists, and one of the five US ATLAS Tier 2 facilities.

atlas detector

Recent News and Highlights from the UChicago ATLAS Group!

April 1, 2019: Congratulations to Emily Smith who has been offered the NDSEG Fellowship, to start in Fall 2019!
January 23, 2019: Congratulations to graduate student Lesya Horyn (adviser: Young-Kee Kim) on her appointment to the ATLAS Early Career Science Board!
October 17, 2018: The gFEX production trigger system (coordinated by David Miller) takes first collision data during Stable Beams!
September 27, 2018: Planning workshop for building a new Cyberinfrastructure and Data-Intensive Analytics Training program at UChicago held with scientists from UChicago, Argonne, Fermilab, and industry partners from Amazon and Udacity.
September 18, 2018: Graduate student Patrick Bryant (Advisor: Mel Shochet) successfully defends his thesis (Search for Pair Production of Higgs Bosons in the Four Bottom Quark Final State Using Proton-Proton Collisions at sqrt(s) = 13 TeV with the ATLAS Detector)!
September 17, 2018: Graduate student Joakim Olsson (Advisor: David Miller) successfully defends his thesis (Searching for supersymmetry in Fully Hadronic Final States with the ATLAS Experiment)!
July 30 - Aug 2, 2018: Current and Former Chicago students, postdocs, faculty meet at the 2018 US ATLAS Summer Workshop in Pittsburgh! See the photos here and here.
July 23, 2018: Search for SUSY with many b-jets and jet substructure in 80 fb-1 of LHC data released! (ATLAS-CONF-2018-041)
July 16-20, 2018: 10th annual BOOST Conference on Boosted Object Phenomenology, Reconstruction and Searches in HEP takes place in Paris, France hosted by former postdoc Reina Camacho (now permanent at LPNHE) and with a talk on SUSY Searches with Boosted Objects from David Miller.
July 9-13, 2018: The 2018 Fermi Summer Interns Program in Science for local 7th graders is hosted by David Miller and Dave Schmitz (neutrinos), with a lecture on ATLAS!
May 23-25, 2018: Chicago students and postdocs (Lesya, Giordon, Tova, Max) present research and new ideas at the ATLAS Supersymmetry Workshop in Stockholm, Sweden
May 17, 2018: May 2, 2017: Graduate student Patrick Bryant (Advisor: Mel Shochet) has been awarded the 2018 Nathan Sugarman Award for Excellence in Graduate Student Research!
May 16, 2018: Rob Gardner hosts panel on "Future Tools: What tools do we need to enable pioneering research" at Future Compute: A Celebration of the Computation Institute
April 26, 2018: Graduate student Giordon Stark (Advisor: David Miller) successfully defends his thesis (The search for supersymmetry in hadronic final states using boosted object reconstruction: (!
April 24-26, 2018: Chicago effort on designing trigger systems using new "multi-processor system-on-chip" (MPSoC) technology presented at the Sixth Common ATLAS CMS Electronics Workshop for LHC Upgrades
April 17, 2018: LHC declared STABLE BEAMS for the first time in 2018. Two colliding bunches with an average bunch intensity of 1.1e11 delivered at 13 TeV to all the LHC experiments.
April 7-8, 2018: David Miller represents Chicago and the US LHC Users Association (USLUA) at the 2018 USA Science & Engineering Festival
March 19, 2018: MWT2 announced as top-performing 2017 Tier2 Computing Center in the world, rated above all other computing centers in ATLAS, including all Tier1 centers, in terms of CPU wall time delivered.
March 13, 2018: Rui Zou presents her paper "Search for invisible Higgs boson decays in vector boson fusion at 13 TeV with the ATLAS detector" to the ATLAS Collaboration.
February 8, 2018: Midwest Tier 2 Computing Center (MWT2) Fest annual get-together of team members and staff from UC, Indiana and Illinois, hosted in PRC 201.