20th Patras Workshop on Axions, WIMPs and WISPs

Session

Afternoon - 6

25 Sept 2025, 16:50

81. Hunting axions with the James Webb Space Telescope

Elena Pinetti (Fermilab)

25/09/2025, 16:50

Axions with a mass around 1 eV can decay into near-infrared photons. Utilising blank-sky observations from the James Webb Space Telescope, I search for a narrow emission line due to decaying dark matter and derive leading constraints on the axion-photon coupling in the eV-scale mass range.

43. Towards a Measurement of Vacuum Magnetic Birefringence with ALPS II

Todd Kozlowski

25/09/2025, 17:10

The vacuum magnetic birefringence (VMB) effect is a long-standing prediction of quantum electrodynamics (QED) that has yet to be observed in a laboratory setting. The ALPS group at DESY intends to measure this elusive phenomenon for the first time by leveraging the unique infrastructure of the ALPS II experiment. The setup will measure the differential optical path length between two...