Positronium energy levels at order mα7: Light-by-light scattering in the two-photon-annihilation channel

被引：19

作者：

Adkins, Gregory S. ^{[1
]}

Parsons, Christian ^{[1
]}

Salinger, M. D. ^{[1
]}

Wang, Ruihan ^{[1
]}

Fell, Richard N. ^{[2
]}

机构：

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

[2] Brandeis Univ, Waltham, MA 01742 USA

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 04期

基金：

美国国家科学基金会;

关键词：

HYPERFINE-STRUCTURE; ANNIHILATION CONTRIBUTIONS; RECOIL CORRECTIONS; GROUND-STATE; PRECISION; MUONIUM; TRANSITION; FORMALISM; INTERVAL; PHYSICS;

D O I：

10.1103/PhysRevA.90.042502

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Recent and ongoing experimental work on the positronium spectrum motivates new efforts to calculate positronium energies at the level of O(alpha(3)) corrections to the lowest-order result. We have obtained results for one set of such corrections involving light-by-light scattering of the photons produced in a two-photon virtual annihilation process. Our result is an energy shift 1.58377 (8)m alpha(7)/pi(3) for the n = 1 singlet state, correcting the ground-state hyperfine splitting by -6.95 kHz. We also obtained a new and more precise result for the light-by-light scattering correction to the real decay of parapositronium into two photons.

引用

页数：8

共 75 条

[1] Positronium hyperfine splitting at order mα7: Light-by-light scattering in the two-photon-exchange channel [J].