Summary
The low-energy ππ scattering is treated within the framework of pole-dominance model. It is found that the contribution of the ρ-meson is as important as that ofS-waves, and that Weinberg’s amplitude of ππ scattering must be corrected to include the ρ contribution.
Riassunto
Si tratta lo scattering ππ di bassa energia nel quadro del modello dei poli dominanti. Si trova che il contributo del mesone ρ è tanto importante quanto quello delle ondeS, e che l’ampiezza di Weinberg dello scattering ππ deve essere corretta in modo da includere il contributo del ρ.
Резюме
В рамках модели полюсного преобладания рассматривается πп рассеяние при малых энергиях. Найдено, что вклад ρ мезона являертся таким же важным, как и вкладS волн, и амплитуда Вейнберга для ππ рассеяния должна быть исправлена за счет включения вклада ρ мезона.
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References
S. Weinberg:Phys. Rev. Lett.,17, 616 (1966).
N. N. Khuri:Phys. Rev.,153, 1477 (1967).
Y. Tomozawa:Nuovo Cimento,46 A, 707 (1966);A. P. Balachandran:Nucl. Phys., B7, 557 (1968).
J. Sucher andC. H. Woo:Phys. Rev. Lett.,18, 723 (1967):T. Akiba andK. Kang:Phys. Lett., 25, B 35 (1967);S. L. Brown andR. L. Goble:Phys. Rev. Lett.,20, 346 (1968);R. Arnowitt, M. H. Friedman, P. Nath andR. Suitor:Phys. Rev. Lett.,20, 475 (1968).
G. F. Chew andS. Mandelstam:Phys. Rev.,119, 567 (1960).
E. T. Meiere andM. Sugawara:Phys. Rev.,153, 1702 (1967);J. R. Fulco andD. Y. Wong:Phys. Rev. Lett.,19, 1399 (1967);S. Y. Chu andB. R. Desai:Phys. Rev. Lett.,21, 54 (1968).
D. J. George, B. Hale andA. Tubis:Phys. Rev.,172, 1740 (1968).
J. J. Sakurai:Ann of Phys.,11, 1 (1960);Phys. Rev. Lett.,17, 552 (1966).
S. L. Adler:Phys. Rev. 137, B 1022 (1965).
J. J. Sakurai:Phys. Rev. Lett.,17, 1021 (1966).
A. H. Rosenfeld, A. Barbaro-Galtieri, W. J. Podolsky, L. R. Price, P. Söding, C. G. Wohl, M. Roos andW. J. Willis:Rev. Mod. Phys.,39, 1 (1967).
W. D. Walker, J. Carroll, A. Garfinkel andB. Y. Oh:Phys. Rev. Lett.,18, 630 (1967).
L. Gutay, P. B. Johnson, F. J. Loeffler, R. L. McIlwain, D. H. Miller, R. B. Willmann andP. L. Csonka:Phys. Rev. Lett.,18, 142 (1967).
J. P. Baton, G. Laurens andJ. Reignier:Phys. Lett.,25, B 419 (1967).
S. Weinberg:Phys. Rev.,166, 1568 (1968). Weinberg has shown in a model of chiral symmetry that the contribution of ρ exchange plus their compensating terms is of the order ofm 4π /m 4ρ . The compensating terms however cannot be reproduced by some well-known resonances.
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Work supported in part by the National Research Council of Canada.
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Lai, C.S. On low-energy pion-pion scattering lengths. Nuovo Cimento A (1965-1970) 62, 192–198 (1969). https://doi.org/10.1007/BF02731801
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DOI: https://doi.org/10.1007/BF02731801