Order alpha(7)ln(1/alpha) contribution to positronium hyperfine splitting.
作者信息
Kniehl BA, Penin AA
机构信息
II. Institut fur Theoretische Physik, Universitat Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
出版信息
Phys Rev Lett. 2000 Dec 11;85(24):5094-7. doi: 10.1103/PhysRevLett.85.5094.
PMID:11102194
Abstract
The logarithmically enhanced alpha(7)ln(1/alpha) contribution to the hyperfine splitting of the positronium ground-state energy levels is calculated in the framework of dimensionally regularized nonrelativistic quantum electrodynamics. The correction is negative and amounts to about 1/3 of the leading logarithmic alpha(7)ln (2)(1/alpha) one. The discrepancy between the experimental measurements and the theoretical prediction is reduced.
摘要
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