August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【376】Measurement of the Lamb shift of Antihydrogen atoms in GBAR

Sep 2, 2021, 6:15 PM
Room B

Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics


Philipp Peter Blumer (ETH Zurich (CH))


This Fall the upgrade of the antiproton decelerator, the Extra Low ENergy Antiproton (ELENA) ring, will start operation at CERN opening a new era for antihydrogen research. In the context of the GBAR experiment aiming to study the gravitational behaviour of antimatter, our group from ETHZ proposed and is preparing a Lamb shift measurement of antihydrogen with an uncertainty of $100~\mathrm{ppm}$. This will allow to extract the antiproton charge radius at a level of $10\%$ and will provide a sensitive test of Lorentz and CPT symmetry. I will present the results of the setup commissioning with hydrogen atoms and plans for the upcoming beamtime with antiprotons.

Primary authors

Philipp Peter Blumer (ETH Zurich (CH)) Gianluca Janka (ETH Zurich (CH)) Ben Ohayon (ETH Zurich (CH)) Christian Regenfus (ETH Zurich (CH)) Paolo Crivelli (ETH Zurich (CH))

Presentation materials