TY - GEN AU - Aad, G. AU - Aguilar Saavedra, Juan Antonio AU - Rodríguez Chala, Mikael AU - Atlas Collaboration PY - 2023 UR - https://hdl.handle.net/10481/85945 AB - This Letter reports the observation of τ-lepton-pair production in ultraperipheral lead-lead collisions Pb+Pb→Pb(γγ→ττ)Pb and constraints on the τ-lepton anomalous magnetic moment aτ. The dataset corresponds to an integrated luminosity of 1.44  nb−1... LA - eng PB - American Physical Society TI - Observation of the γγ→ττ Process in Pb+Pb Collisions and Constraints on the τ-Lepton Anomalous Magnetic Moment with the ATLAS Detector DO - 10.1103/PhysRevLett.131.151802 ER -