Key points are not available for this paper at this time.
In heavy-ion collisions, the highly relativistic ions act as a strong source of electromagnetic radiation, enhanced by the large proton charge number Z. Ultra-peripheral collisions (UPC) offer a natural environment where one can observe the photon-initiated production of Beyond Standard Model (BSM) processes with QED couplings. One such process sensitive to BSM effects is light-by-light scattering. This process was directly observed for the first time in UPC events at the LHC by ATLAS. In these proceedings, the recent ATLAS measurements of light-by-light scattering are presented. These measurements are performed using the full Run-2 dataset, which results in substantially reduced uncertainties compared to the previous measurements. The new measurements provide a precise and unique opportunity to investigate extensions of the Standard Model, such as the presence of axion-like particles. Measurements of tau-pair production via two-photon scattering that investigate the anomalous magnetic moment of the tau lepton are also presented. This process is also potentially sensitive to BSM effects.
A. Ogrodnik (Fri,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: