Order-α radiative correction to the rate for parapositronium decay to four photons

被引：9

作者：

Adkins, GS ^{[1
]}

Pfahl, ED ^{[1
]}

机构：

[1] Franklin & Marshall Coll, Lancaster, PA 17604 USA

来源：

PHYSICAL REVIEW A | 1999年 / 59卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.59.R915

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have calculated the O(alpha) radiative correction affecting the decay rate of parapositronium to four photons. Our result for the rate is Gamma(4 gamma) = Gamma(LO)(4 gamma)[1 - 14.5(6)alpha/pi+O(alpha(2))], where Gamma(LO)(4 gamma) is the lowest order four-photon decay rate. Our prediction for the four-photon to two-photon branching ratio, including all O(cr) corrections, is R = 1.4388(21) x 10(-6). We also have a higher precision result for the lowest-order rate: Gamma(LO)(4 gamma) = 0.013 895 7(4)m alpha(7). [S1050-2947(99)50202-3].

引用

页码：R915 / R918

页数：4

共 23 条

[1] MEASUREMENT OF E+E- ANNIHILATION AT REST INTO 4 GAMMA-RAYS [J].