2010/03/23 by S. Asai, Asai, S., T. Suehara +24 · 1 citation
Engineering · Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #Crystallography and Radiation Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Muon and positron interactions and applications #hep-ex #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.1003.4324
contributed to "The 3rd International Workshop on Far-Infrared Technologies 2010 (U.Fukui)"
openalex publication_date 2010/03/23 · arxiv created 2010/04/16 · arxiv updated 2015/03/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Positronium is an ideal system for the research of the QED, especially for the QED in bound state. The discrepancy of 3.9σis found recently between the measured HFS values and the QED prediction (O(α3)). It might be due to the contribution of the unknown new physics or the systematic problems in the previous all measurements. We propose new method to measure HFS precisely and directly. A gyrotron, a novel sub-THz light source is used with a high-finesse Fabry-Pérot cavity to obtain enough radiation power at 203 GHz. The present status of the optimization studies and current design of the experiment are described.