First estimates of the $(��+ ��)^��$ from two--photon experiments
| Autor: | Kaloshin, A. E., Persikov, V. M., Serebryakov, V. V. |
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| Rok vydání: | 1994 |
| Předmět: | |
| DOI: | 10.48550/arxiv.hep-ph/9402220 |
| Popis: | We carry out the semi--model analysis of existing data on the angular distributions of the $����\rightarrow��^+ ��^- ,\ ��^0 ��^0$ reactions with purpose to obtain S-wave cross section and D-wave's parameters. In the first time we obtain from experiment the sum of electrical and magnetic pion polarizabilities: $(��+ ��)^{��^+} = 0.28 \pm 0.07$ (MARK-II \cite{M2}), \ \ $(��+ ��)^{��^+} = 0.38 \pm 0.05$ (CELLO \cite{CELLO}), \ \ $(��+ ��)^{��^0} = 1.26 \pm 0.06$ (Crystal Ball \cite{CB}) \ \ in units of $10^{-42} \ cm^3$ ($e^2=4 ����$). Latex, 5 pages, no figures, ISU-IAP.Th94-01, Irkutsk |
| Databáze: | OpenAIRE |
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