ATLAS Experiment

atlas.cern

Official public website for the ATLAS Experiment at CERN

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ATLAS sees first direct evidence of light-by-light scattering at high energy

2017253 points79 comments Science & Space details

A light-by-light scattering candidate event measured in the ATLAS detector. (Image: ATLAS Collaboration/CERN) Geneva, 14 August 2017. Physicists from the ATLAS experiment at CERN have found the first direct evidence of high energy light-by-light scattering, a very rare process in which two photons – particles of light…

Atlas observes light scattering off light

2019182 points36 comments Science & Space details

Figure 1: ATLAS event display showing the energy deposits of two photons in the electromagnetic calorimeter (green) on opposite sides and no other activity in the detector, which is the clean signature of light-by-light scattering. The Feynman diagram of this process is shown in the lower right corner. (Image: ATLAS…