Seminarium Fizyki Wielkich Energii
sala B2.38, ul. Pasteura 5
2024-01-26 (10:15) 
dr Krzysztof Cieśla (AGH)
Light-by-light scattering and dilepton production in ultra-peripheral heavy-ion collisions with ATLAS
The presence of a large flux of photons accompanying relativistic heavyion beams leads to a significant number of photon-induced processes,including photon-photon fusion. These processes are remarkably cleanwith little or no remnant activity from the interacting particles. Iwill present the status of photon-photon fusion measurements resultingin either two photons (γγ→γγ) or two charged leptons (γγ→l+l−) inthe final state, measured by the ATLAS experiment in ultra-peripheralheavy-ion collisions.