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!

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])
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 (
December 18, 2015: Run 2 search paper in photon+jet mass released (
December 15, 2015: ATLAS and CMS present physics results from Run 2 at special CERN Seminar! including indications of an excess in the diphoton mass spectrum
December 15, 2015: Run 2 search paper for fully hadronic diboson resonance released (ATLAS-CONF-2015-073)
December 14, 2015: Run 2 search paper for SUSY in multi-b final states with top-tagging applied (ATLAS-CONF-2015-067)
December 8, 2015: Run 2 search paper for strong gravity in mulijet events released (EXOT-2015-09)
December 4, 2015: Run 2 search paper in dijet mass and angular distributions released! (First Run 2 seach paper!) (EXOT-2015-02)
November 22, 2015: Yangyang Cheng and Max Swiatlowski win the 2015 US LHC Users Association Lightning Round competition!