The ATLAS experiment is a general-purpose particle detector at the Large Hadron Collider. Layers around the collision point combine track reconstruction, electromagnetic and hadronic calorimeters, and outer muon detectors. A central solenoid and larger toroidal magnet system provide magnetic bending in different detector regions.[ref]
A charged track's curvature estimates momentum; a calorimeter measures deposited energy; outer signals help identify penetrating muons. Combining these measurements distinguishes candidate particle types and reconstructs decays. Apparent missing transverse momentum is an event balance inferred from the measured products, so detector coverage, calibration and reconstruction errors also affect it.
- Evidence for light-by-light scattering in heavy-ion collisions with the ATLAS detector at the LHC by ATLAS Collaboration
- Search for squarks and gluinos with the ATLAS detector in final states with jets and missing transverse momentum using 4.7 fb^-1 of sqrt(s) = 7 TeV proton-proton collision data by ATLAS Collaboration
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The ATLAS (A Toroidal LHC ApparatuS) experiment is one of the major particle physics experiments located at the Large Hadron Collider (LHC) at CERN, the European Organization for Nuclear Research, near Geneva, Switzerland. It is designed to investigate fundamental questions in high-energy physics by studying the collisions of protons at unprecedented energy levels.