Electroweak corrections to τ⁺τ⁻ production in ultraperipheral heavy-ion collisions at the LHC

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2025年8月6日

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Stefan Dittmaier,
Tim Engel,
José Luis Hernando Ariza,
Mathieu Pellen

摘要

While the anomalous magnetic moments of the electron and the muon have been measured with remarkable precision, the magnetic moment of the τ-lepton is only known to rather limited precision. A promising approach to measure it exploits τ⁺τ⁻ production in ultraperipheral collisions of lead ions at the LHC. In this article, a state-of-the-art theory prediction for τ⁺τ⁻ production including leptonic τ-decays is provided. The impact of spin correlations between the τ-leptons, of the masses of final-state leptons, of next-to-leading-order electroweak corrections, and of the parametrization of the photon flux are discussed.

Electroweak corrections to τ+τ− production in ultraperipheral heavy-ion collisions at the LHC

摘要

Electroweak corrections to τ⁺τ⁻ production in ultraperipheral heavy-ion collisions at the LHC