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This article is cited in 19 scientific papers (total in 19 papers)
REVIEWS OF TOPICAL PROBLEMS
Electromagnetic properties of pions at low energies
M. V. Terent'ev Institute for Theoretical and Experimental Physics, Moscow
Abstract:
The theoretical structure of the pion-photon interaction amplitudes at low energies and the possibility of studying them experimentally are reviewed. It is pointed out that it is possible to measure the $\pi\pi$ scattering lengths in photon-pion transitions. For processes involving an odd number of pions, a discussion is given of the fundamental role of the $\pi^0\to2\gamma$ decay amplitude, which determines the form of all more complex amplitudes. This fact is connected with the anomalies in the axial-vector current that appears in the weak interaction. In processes involving an even number of pions, the radius and polarizability of the $\pi^-$ meson appear as basic parameters. The polarizability is related to the weak decay amplitude.
Citation:
M. V. Terent'ev, “Electromagnetic properties of pions at low energies”, UFN, 112:1 (1974), 37–82; Phys. Usp., 17:1 (1974), 20–43
Linking options:
https://www.mathnet.ru/eng/ufn10124 https://www.mathnet.ru/eng/ufn/v112/i1/p37
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Abstract page: | 39 | Full-text PDF : | 8 |
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