Speaker
Prof.
Eberhard WIDMANN
(Stefan Meyer Institute)
Description
The CPT symmetry is one of the cornerstones of the Standard Model of Particle Physics. It's consequence that properties of particles and antiparticles are either exactly equal or exctly opposite is being tested using antihydrogen spectroscopy at the Antiproton Decelerator of CERN. The ASACUSA collaboration is pursuing a meansurement of the ground-state hyperfine splitting GS-HFS of antihydrogen in a cold atomc beam, which offers one of the most sensitive tests of CPT symmetry. Using a polarized hydrogen beam measurements of one of the microwave transitions within the GS-HFS have been performed at the ppb level, and measurements of a second transition are under way. These results can be used to constrain some of the coefficients of the SME model of Alan Kostelecky (Indiana).
Author
Prof.
Eberhard WIDMANN
(Stefan Meyer Institute)