Journal article
Nonrelativistic QED and next-to-leading hyperfine splitting in positronium
Abstract
We compute the next-to-leading O(mα5) contribution to the hyperfine splitting in positronium within the framework of nonrelativistic QED (NRQED). When applied to the ground state, our calculation reproduces the known result, providing a further test of NRQED techniques. In addition to providing a very simple method of calculation of this standard result, we also obtain new expressions for excited states of positronium with negligible additional …
Authors
Labelle P; Zebarjad SM; Burgess CP
Journal
Physical Review D, Vol. 56, No. 12, pp. 8053–8061
Publisher
American Physical Society (APS)
Publication Date
December 15, 1997
DOI
10.1103/physrevd.56.8053
ISSN
2470-0010