Radiative tail in π
e2
decay and some remarks on μ-e universality |
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Authors: | E A Kuraev |
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Institution: | (1) Bogoliubov Laboratory for Theoretical Physics, JINR, 141980 Dubna, Russia |
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Abstract: | The results of lowest-order perturbation theory calculations of the photon and positron spectra in radiative π
e2
decay are generalized to all orders of perturbation theory using the structure-function method. An additional source of radiative
corrections to the ratio of the positron and muon channels of pion decay, due to emission of virtual and real photons and
pairs, is considered. It depends on details of the detection of the final particles and is large enough to be taken into account
in theoretical estimates with a level of accuracy of 0.1%.
Pis’ma Zh. éksp. Teor. Fiz. 65, No. 2, 119–122 (25 January 1997)
Published in English in the original Russian journal. Edited by Steve Torstveit. |
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Keywords: | |
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