HEP Seminars

Colliding light, tau g–2, and broadband axion detection

by Dr Jesse Liu (University of Cambridge)

Liverpool Physics

Liverpool Physics

At 337 and on Zoom (Meeting ID: 925 2728 3776 Passcode: HEP@UL1V)

The muon anomalous magnetic moment (g–2) reports tantalising tensions with the Standard Model. But what about tau g–2? Remarkably, tau g–2 remains poorly constrained but can be 280 times more sensitive to new physics than the muon. Recently, CMS and ATLAS announced groundbreaking measurements of tau g–2 competitive with LEP using the landmark observation of tau pairs created via photon collisions in LHC heavy-ion data. Beyond colliders, limitations with existing searches for axions motivate the Broadband Reflector Experiment for Axion Detection (BREAD) proposal at Fermilab. Recent quantum sensing progress enables BREAD to open multi-decade discovery sensitivity to axion dark matter above microwave frequencies that has long eluded cavity haloscopesBREAD provides an exciting nexus for interdisciplinary science bridging astronomy, particle physics, and quantum technology.

Organized by

Costas Andreopoulos; Jan Kretzschmar