First test of $O(α^{2})$ correction of the orthopositronium decay rate

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dc.creatorKataoka, Y.
dc.creatorAsai, S.
dc.creatorKobayashi, T.
dc.date2008-09-09
dc.date.accessioned2026-07-07T12:28:45Z
dc.date.available2026-07-07T12:28:45Z
dc.descriptionPositronium is an ideal system for the research of the bound state QED. New precise measurement of orthopositronium decay rate has been performed with an accuracy of 150 ppm. This result is consistent with the last three results and also the 2nd order correction. The result combined with the last three is 7.0401$\pm0.0007μ\mathrm{sec}^{-1}$ (100 ppm), which is consistent with the 2nd order correction and differs from the 1st order calculation by 2.6$σ$ It is the first test to validate the 2nd order correction.
dc.descriptionwill be submitted to Phys. Lett. B
dc.identifierhttps://arxiv.org/abs/0809.1594
dc.identifierhttp://arxiv.org/abs/0809.1594
dc.identifierPhys.Lett.B671:219-223,2009
dc.identifierdoi:10.1016/j.physletb.2008.12.008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215642
dc.subjectHigh Energy Physics - Experiment
dc.subjectAtomic Physics
dc.titleFirst test of $O(α^{2})$ correction of the orthopositronium decay rate
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