Hyperfine spectroscopy of hydrogen and antihydrogen in ASACUSA
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Abstract
The ASACUSA collaboration at the Antiproton Decelerator of CERN aims at a precise measurement of the antihydrogen ground-state hyperfine structure as a test of the fundamental CPT symmetry. A beam of antihydrogen atoms is formed in a CUSP trap, undergoes Rabi-type spectroscopy and is detected downstream in a dedicated antihydrogen detector. In parallel measurements using a polarized hydrogen beam are being performed to commission the spectroscopy apparatus and to perform measurements of parameters of the Standard Model Extension (SME). The current status of antihydrogen spectroscopy is reviewed and progress of ASACUSA is presented.
Keywords
Antihydrogen CPT Hyperfine spectroscopy Matter-antimatter symmetry Download
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Acknowledgements
Open access funding provided by Austrian Science Fund (FWF). This work has been supported by the European Research Council under European Union’s Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement (291242), the Austrian Ministry of Science and Research, the Austrian Science Fund (FWF): W1252-N27, a Grant-in-Aid for Specially Promoted Research (24000008) of MEXT and the RIKEN Pioneering Project. We express our gratitude towards the AD group of CERN.
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