Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 35: Electroweak Physics I (Weak Mixing Angle, Tau Production)

T 35.5: Vortrag

Dienstag, 1. April 2025, 17:15–17:30, VG 2.103

Theoretical predictions for tau-pair production in ultraperipheral hadron collisions — Stefan Dittmaier, Tim Engel, •Jose Luis Hernando Ariza, and Mathieu Pellen — University of Freiburg

The anomalous magnetic moments of the electron and the muon have been measured with remarkable precision. On the other hand, there is no precise measurement for the magnetic moment of the tau-lepton. A promising approach is to measure it via the tau-pair production in ultraperipheral collisions of lead ions at the LHC. In this talk, I will present state-of-the-art theoretical predictions for photonic tau-pair production including leptonic tau-decays. In particular, the impact of spin correlations between the tau-leptons and next-to-leading-order electroweak corrections will be discussed.

Keywords: anomalous magnetic moment; tau lepton