Abstract

We present a brief, and unfortunately incomplete, summary of the 2013 Workshop on Antimatter Gravity (WAG) held at Bern, Switzerland.

Highlights

  • Antihydrogen physics has come a long way since the first workshop dedicated to it, which was held in Karlsruhe, back in 1987

  • Incomplete, summary of the 2013 Workshop on Antimatter Gravity (WAG) held at Bern, Switzerland

  • At the time the LEAR (Low Energy Antiproton Ring) facility was available at CERN, though it was mostly devoted to low-to-medium energy particle physics experiments, albeit antihydrogen moving at high speeds was first isolated there.[5]

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Summary

Introduction

Antihydrogen physics has come a long way since the first workshop dedicated to it, which was held in Karlsruhe, back in 1987. The proceedings from that meeting (volume 44 of Hyperfine Interactions) reveal that, even there was some speculation on attempting gravity measurements with cold (and possibly trapped) antihydrogen.[1, 2] Most of the contributions at that meeting were devoted to discussing possible ways to make antihydrogen, and some of the techniques that might be used, based around positron beam experimentation (see e.g., Ref. 3 for a contemporary review) and the early antiproton trapping experiments.[4] At the time the LEAR (Low Energy Antiproton Ring) facility was available at CERN, though it was mostly devoted to low-to-medium energy particle physics experiments, albeit antihydrogen moving at high speeds was first isolated there.[5] PS196 (TRAP) was performing experiments devoted to precision comparisons of the charge-to-massratio of the antiproton to that of the proton as a test of CPT.[6] The only other low energy antiproton experiment in the LEAR era was PS200, which by the mid1990’s had been re-designated as an antihydrogen test experiment, and was busily capturing large quantities of antiprotons and holding them for considerable periods of time.[7, 8] This is an Open Access article published by World Scientific Publishing Company. For a workshop with close to 30 scientific presentations, it will not be possible to summarise adequately all contributions, and I apologise to all whose efforts are not well represented here

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