Phenomenology 2025 Symposium

Colliding light to measure tau g–2

19 May 2025, 15:45

15m

David Lawrence Hall 106, University of Pittsburgh

Electroweak, Higgs, and Top Quark Physics Electroweak

Speaker

Jesse Liu (New York University)

Description

The electron and muon anomalous magnetic moment (g–2) are among the most precisely tested quantities in nature. But what about tau-leptons? Long overlooked, tau g–2 is so poorly constrained it cannot even test Schwinger's landmark $\alpha /2\pi \simeq 0.0012$ prediction from 1948. This leaves striking room for new physics where taus enjoy 280 times greater sensitivity than muons. Creative proposals to measure tau g–2 via photon collisions are initiating an exciting new LHC program using unconventional tracking. These advances open tests of quantum electrodynamics in uncharted regimes that could reveal novel discoveries. Based on 2403.06336

Presentation materials

Pheno-19May2025-JL.pdf