The ATLAS detector studies proton-proton collisions at a center of mass energy of 14 TeV, seven times higher than previous facilities. It has an excellent chance for discovering the source of electroweak symmetry breaking (the Higgs boson) and possibly 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 and will double its energy in 2013. The Chicago group built much of the readout electronics for the hadron calorimeter (TileCal) and is currently involved in preparing an upgrade to the trigger system (FTK) used to identify interesting interactions to be recorded. The group is heavily involved in analysing the data taken by the experiment.

The Chicago group consists of six faculty members 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!

Oct 1st, 2016: Postdoctoral scholar Max Swiatlowski appointed as convener of the subgroup on SUSY searches in squark and gluino final states and signatures in ATLAS!
September 22, 2016: Measurement paper for collinear W emission (i.e "W-strahlung") released (
August 5, 2016: Physics Briefing ICHEP 2016: Hunting for new physics with boosted bosons
August 4, 2016: 13 TeV results in search for diboson resonances in the VV and VH topologies decaying hadronically released (ATLAS-CONF-2016-055 and ATLAS-CONF-2016-083)
August 1, 2016: Welcome to Chicago, a hub for particle physics research
August 4, 2016: Results in the search for SUSY in multi-b final states using 2015+2016 data reported (ATLAS-CONF-2016-052)
August 3, 2016: Six Chicago ATLAS members presenting new results and highlights at ICHEP 2016! Miles Wu (on collinear W emission), Ilija Vukotic (on ATLAS computing analytics), David Miller (on SUSY searches and gFEX hardware), Karol Krizka (on FTK hardware and dark matter searches), Rob Gardner (on HEP Computing), and John Alison (on b-jet triggers and Higgs searches)
August 1, 2016: Higgs discovery raises new questions: Bump in collider data: a siren song or new particle?
August 1, 2016: Computation propels LHC discoveries: UChicago electronics sort through flood of physics data
July 30, 2016: Run 2, 13 TeV boosted Higgs identification and gluon to bb studies released (ATLAS-CONF-2016-039)
June 8, 2016: Results in search for the Standard Model Higgs boson produced by vector-boson fusion in 8 TeV pp collisions and decaying to bottom quarks with the ATLAS detector released and submitted to JHEP (arXiv:1606.02181 [hep-ex])
May 30, 2016: Results in search for gluino pair production decaying to 4 tops using boosted objects released (
April 1st, 2016: Postdoctoral scholar Reina Camacho appointed as convener of the subgroup on Exotics searches using diboson signatures in ATLAS!
March 28, 2016: Results in the search for resonances in the dijet mass distribution with 1 or 2 jets identified as b-jets at sqrt(s)=13 TeV released! (An ATLAS first!) (EXOT-2015-22)
March 25 and 29, 2016: Beam splashes at the LHC: 2016 data taking beings!!!
March 17, 2016: Results in the search for pair production of Higgs bosons in the 4b final state at sqrt(s)=13 TeV reported (ATLAS-CONF-2016-017)
March 8, 2016: Reina Camacho featured among the 7 inspiring women from the ATLAS experiment in celebration of International Women's Day 2016
March 7-8, 2016: UChicago will be hosting the UChicago/ASC-ANL software tutorial!
February 29, 2016: Run 1 gluon to bb substructure CONF note released (ATLAS-CONF-2016-002)
February 24, 2016: Congratulations to Gabriel Facini was awarded a coveted STFC Rutherford Fellowship!
February 24, 2016: Jet energy scale uncertainties using full 13 TeV 2015 dataset released (JETM-2016-002, JETM-2015-003)
January 27, 2016: Run 1 RPV SUSY Stop paper released (