20-25 October 2019
PSI
Europe/Zurich timezone

Positronium and Muonium precision spectroscopy: Measurement of the 1S-2S and excited state hyperfine transitions

25 Oct 2019, 12:30
20m
WHGA/001 - Auditorium (PSI)

WHGA/001 - Auditorium

PSI

Oral Session

Speaker

Zakary Burkley (ETH Zürich, Institute for Particle Physics and Astrophysics)

Description

Positronium and Muonium are excellent systems to test bound-state QED theory to high precision. This has motivated numerous precise experiments aimed at measuring the hyperfine splitting and 1S-2S transition of these atoms.

Currently, there is some disagreement with the most recent bound-state QED calculations for the hyperfine splitting in positronium. Our approach to resolve this, PHySES, eliminates several possible sources of systematics present in earlier experiments by a novel experimental design.

Furthermore, measurements of the 1S-2S transition can test bound state QED in the ppb range and determine fundamental constants, e.g., the muon mass. Here we present current efforts to reach this sensitivity.

Primary author

Zakary Burkley (ETH Zürich, Institute for Particle Physics and Astrophysics)

Co-authors

Michael Heiss (ETH Zürich, Institute for Particle Physics and Astrophysics) Dr Artem Golovizin (Lebedev Physical Institute) Mu-Mass Collaboration

Presentation Materials