First test of O (α2) correction of the orthopositronium decay rate

被引：56
作者：
Kataoka, Y.
Asai, S. [1 ]
Kobayashi, T.
机构：
[1] Univ Tokyo, Int Ctr Elementary Particle Phys, Bunkyo Ku, Tokyo 1130033, Japan
来源：
PHYSICS LETTERS B | 2009年 / 671卷 / 02期
基金：
日本学术振兴会;
关键词：
LIVED NEUTRAL BOSONS; PRECISION-MEASUREMENT; RADIATIVE-CORRECTIONS; SEARCH;
D O I：
10.1016/j.physletb.2008.12.008
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Positronium 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 +/- 0.0007 mu s(-1) (100 ppm), which is consistent with the 2nd order correction and differs from the 1st order calculation by 2.6 sigma. It is the first test to validate the 2nd order correction. (C) 2008 Elsevier BY. All rights reserved.
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收藏
页码：219 / 223
页数：5
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