New data on the pion – pion interaction at low energies

V.V. Vereshchagin^a, K.N. Mukhin^b, O.O. Patarakin^b
^aSt. Petersburg State University, Universitetskaya naberezhnaya, 7 - 9, St. Petersburg, 199034, Russian Federation
^bInstitute of General and Nuclear Physics, Russian Research Centre ‘Kurchatov Institute’, pl. Kurchatova 1, Moscow, 123182, Russian Federation

Current theoretical and experimental approaches to the pion-pion interaction are discussed and the results obtained are presented. Experiments on πN \rightarrow ππN reactions as a source of information on ππ scattering are described as well as polarized target experiments and those on K_e4 decay and pionium. The concepts of effective field theory and the basic ideas of chiral perturbation theory are discussed. The problem of light scalar resonances is analyzed and the incorrectness of data analysis procedures is considered.

PACS: 13.75.−n, 13.90.+i, 14.40.−n, 14.40.Aq (all)
DOI: 10.1070/PU2000v043n04ABEH000612
URL: https://ufn.ru/en/articles/2000/4/a/
Web of Science

000087162200001
Citation: Vereshchagin V V, Mukhin K N, Patarakin O O "New data on the pion-pion interaction at low energies" Phys. Usp. 43 315–347 (2000)

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Оригинал: Верещагин В В, Мухин К Н, Патаракин О О «Новые данные о пион-пионном взаимодействии при низких энергиях» УФН 170 353–386 (2000); DOI: 10.3367/UFNr.0170.200004a.0353

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