Progress towards an improved comparison of the proton-to-antiproton charge-to-mass ratios

• DOI: 10.1007/s10751-018-1499-x
• Publication Date: 2018-07-09T07:16:34Z
• Authors: Takashi Higuchi; James A. Harrington; Matthias J. Borchert; Pascal E. Blessing; Jack A. Devlin; Jonathan Morgner; Stefan Sellner; Christian Smorra; Matthew A. Bohman; Andreas H. Mooser; Georg L. Schneider; Natalie Schön; Markus Wiesinger; Klaus Blaum; Yasuyuki Matsuda; Christian Ospelkaus; Wolfgang Quint; Jochen Walz; Yasunori Yamazaki; Stefan Ulmer
• Keywords: Speichertechnik - Abteilung Blaum; 0103 physical sciences; 01 natural sciences

High-precision comparisons of the proton-to-antiproton charge-to-mass ratios provide sensitive tests of the fundamental charge, parity, time (CPT) invariance. In 2014, we performed such a measurement with a fractional precision of 69parts in a trillion (p.p.t.). In this article, we describe technical developments which were implemented to improve the precision of our previous measurement by at least a factor of 3.