Journal ArticleDOI
On the radiative corrections α2 ln α to the positronium decay rate
I.B. Khriplovich,A.S. Yelkhovsky +1 more
TLDR
In this article, the radiative corrections ≈ α 2 ln α to the positronium decay rate were calculated in the Breit approximation which is shown to be quite adequate for the problem.About:
This article is published in Physics Letters B.The article was published on 1990-08-30. It has received 34 citations till now. The article focuses on the topics: Positronium & Radiative transfer.read more
Citations
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Journal ArticleDOI
Theory of light hydrogenlike atoms
TL;DR: In this article, a review of the present status and recent developments in the theory of light hydrogenic atoms, electronic and muonic, are extensively reviewed, based on the quantum field theoretical approach to loosely bound composite systems.
Journal ArticleDOI
New measurement of the orthopositronium decay rate
Shoji Asai,S. Orito,N. Shinohara +2 more
TL;DR: In this paper, the decay rate of the orthopositronium was measured with a high-resolution germanium detector and the combined result was λ 0 = 7.0398 ± 0.0025 (stat.) ± 0.0015 (sys.) μs−1, which was consistent with the QED prediction, and differs by 2.9−4.1Φ from three recent measurements.
Journal ArticleDOI
First test of O(α2) correction of the orthopositronium decay rate
TL;DR: In this article, a new precise measurement of orthopositronium decay rate has been performed with an accuracy of 150 ppm, which is consistent with the last three results and also the 2nd order correction.
Journal ArticleDOI
Two-Loop Correction to the Orthopositronium Decay Rate
TL;DR: The O(α 2 ) correction to the orthopositronium decay rate was calculated in this paper, and the resulting correction is 45.06(26) in units of (α/π) 2 times the lowest order rate.
Journal ArticleDOI
Estimating perturbative coefficients in quantum field theory and the ortho-positronium decay rate discrepancy
TL;DR: In this article, a method to estimate perturbative coefficients in high energy physics, condensed matter theory and statistical physics is presented, which is shown to be accurate for a wide class of expansions.
References
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Journal ArticleDOI
Three photon annihilation of an electron - positron pair
A. Ore,J. L. Powell +1 more
TL;DR: In this article, an electron-positron pair accompanied by the emission of three photons is discussed for the case of small relative velocity of the two particles and the energy spectrum of the photons is derived and the cross section for the process is calculated.
Journal ArticleDOI
O ($\alpha^2$ Log ($\alpha^*$*-1)) Corrections in Positronium: Hyperfine Splitting and Decay Rate
TL;DR: In this paper, the authors analyzed the terms of relative order of 6/m/sub e//2approx.0.24 to positronium hyperfine splitting from annihilation kernels, including several new contributions.
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New precision measurement of the orthopositronium decay rate: A discrepancy with theory.
TL;DR: In this paper, the vacuum decay rate of orthopositronium (o-Ps), formed in a gas, has been measured to be 7.5 standard deviations above the theoretical value, which is 4 times more accurate than any previous measurement.
Journal ArticleDOI
O(α) Corrections to the Decay Rate of Orthopositronium
TL;DR: In this paper, a new calculation of the O (..cap alpha..) corrections to the decay rate of orthopositronium is presented. But this is substantially below all measured rates as well as previous theoretical estimates.