Summary
The coherent photoproduction of the ρ-meson from complex nuclei is analysed. By using an optical-model description of the process, the electromagnetic and nuclear ρ-ω mixing is considered in detail. A mixing parameter, describing the ratio (ω → π+π−)/(ρ → π+π−) for the amplitudes is derived in which the nuclear mixing parts are clearly exhibited.
Riassunto
Si analizza la fotoproduzione coerente di mesoni ρ da nuclei complessi. Si considera dettagliatamente, usando una descrizione del processo basata su un modello ottico, la misccla ϱ-ω elettromagnetica e nucleare. Si deriva il parametro di miscela, che deserive il rapporto (ω → π+π−)/(ρ → π+π−) per le ampiezze, in cui le parti della miscela nucleare sono chiaramente presentate.
Реэюме
Аналиэируется когерентное фоторождение ρ-меэона на сложных ядрах. Испольэуя оптическую модель для описания процесса, подробно рассматривается злектромагнитное и ядерное ρ-ω смеивание. Выводится параметр смещивания, описываюший отнощение (ω→π+π−)/(ρ→π+π−) для амплитуд, в который явно входят части ядерного смещивания.
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Literatur
K. Gottfried: inProceedings of the 1971 International Symposium on Electron and Photon Interactions at High Energies, edited byN. B. Mistry (Ithaca, N. Y., 1972).
D. R. Yennie: inHadronic Interactions of Electrons and Photons, edited byJ. Cummings andH. Osborn (London and New York, 1971).
D. W. G. S. Leith: inHadronic Interactions of Electrons and Photons, edited byJ. Cummings andH. Osborn (London and New York, 1971);R. L. Anderson, D. Gustavson, J. Johnson, I. Overman, D. M. Ritson, B. H. Wiik, R. Talman andD. Worcester:Phys. Rev. D,4, 3245 (1971).
J. E. Augustin, D. Benaksas, J. Buon, F. Fulda, V. Gracco, J. Haissinski, D. Lalanne, F. Laplanche, J. Lefrançois, P. Lehman, P. C. Marin, J. Perez-y-Jorba, F. Rumpf andE. Silva:Lett. Nuovo Cimento,2, 214 (1969).
S. L. Glashow:Phys. Rev. Lett.,7, 499 (1961).
P. J. Biggs, R. W. Clifft, E. Gabathuler, P. Kitching andR. E. Rand:Phys Rev. Lett.,24, 1201 (1970).
H. J. Behrend, C. K. Lee, F. Lobkowicz, E. H. Thorndike, M. E. Nordberg andA. A. Wehmann:Phys. Rev. Lett.,27, 61 (1971).
H. Alvensleben, U. Becher, W. Busza, M. Chen, K. J. Cohen, R. J. Edwards, P. M. Mautsch, R. Marshall, T. Nash, M. Rohde, H. F. W. Sadrozinski, G. H. Sanders, H. Schubel, S. C. C. Ting andSan-Lan Wu:Phys. Rev. Lett.,21, 888 (1971).
K. Gottfried andD. I. Julius:Phys. Rev. D,1, 140 (1970).
V. F. Weisskopf andE. P. Wigner:Zeits. Phys.,63, 54 (1930);65, 18 (1930). For an elementary review of the Wigner-Weisskopf method as well as applications of it to several different two-level systems see:J. Bernstein: inCargèse Lectures in Physics, Vol.1, edited byM. Lévy (New York, N. Y., 1966).
J. Harte andR. Sachs:Phys. Rev.,135, B 459 (1964).
F. M. Renard: inErgebnisse der Exacten Naturwissenschaften, Vol.63 (Berlin, 1972) and references cited therein.
M. Gourdin, F. M. Renard andL. Stodolsky:Phys. Lett.,30 B, 347 (1969).
M. L. Goldberger andK. M. Watson:Collision Theory, Sect. II.4 (New York, N. Y., 1964);R. J. Glauber: inLectures in Theoretical Physics, Vol.1, edited byW. E. Brittin et al. (New York, N. Y., 1959);High-Energy Physics and Nuclear Structure, edited byS. Devons (New York, N. Y., 1970) and references cited therein.
G. Wolf: inProceedings of the 1971 International Symposium on Electron and Photon Interactions at High Energies, edited byN. B. Mistry (Ithaca, N. Y., 1972).
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Fellow of the Consejo Nacional de Investigaciones Cientificas y Tecnicas, under IAEA contract at the ICTP.
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Gregorio, M.A. Nuclear effects in the analysis of the ρ-ω mixing from photoproduction. Nuov Cim A 20, 437–451 (1974). https://doi.org/10.1007/BF02821974
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DOI: https://doi.org/10.1007/BF02821974