Summary
π+-Nuclei coherent interactions with 2, 3, 4 and 5 pions in the final state have been looked for in a heavy-liquid bubble chamber experiment with direct detection of π0,s. Abundant coherent production has been found in the three-pion channels π+π+π− and π+π0π0, essentially in the A1 mass region, but the available statistics did not allow to put in evidence coherence in the 2, 4 and 5π channels, for which upper limits of cross-sections are given. The branching ratioR=Γ(A1→+ρ0)/Γ(A1→0ρ+) was found to beR=0.67±0.22.
Riassunto
Si osservano interazioni coerenti π+-nuclei con 2, 3, 4 e 5 pioni nello stato finale in un esperimento in camera a bolle a liquido pesante con rivelazione diretta dei π0. Si trova un'abbondante produzione coerente nei canali a tre pioni π+π+π− e π+π0π0, essenzialmente nella regione di massa della A1, ma i dati statistici disponibili non consentono di mettere in evidenza la coerenza nei canali a 2, 4 e 5 pioni, per i quali si forniscono i limiti superiori delle sezioni d'urto. Il rapporto di ramificazioneR=Γ(A1→+ρ0)/Γ(A1→0ρ+) risulta uguale a 0.67±0.22.
Similar content being viewed by others
References
R. Arnold: Thesis, Université de Strasbourg (1972).
M. Aderholz, J. Bartsch, M. Deutschmann, G. Kraus, R. Speth, C. Grote, K. Lanius, S. Nowak, M. Walter, H. Bottcher, T. Byer, V. T. Cocconi, J. D. Hansen, G. Kellner, A. Mihul, D. R. O. Morrison, V. I. Moskalev andH. Tofte:Phys. Lett.,27 B, 174 (1968).
J. F. Allard, D. Drijard, J. Hennessy, R. Huson, A. Lloret, J. Six, J. J. Veillet, G. Bellini, M. di Corato, E. Fiorini, P. Negri, M. Rollier, J. Crussard, J. Ginestet, A. H. Tran, H. H. Bingham, R. Diebold, W. B. Fretter, H. J. Lubatti, W. Michael andK. Moriyasu:Phys. Lett.,19, 431 (1965).
R. Huson, H. J. Lubatti, J. Six, J. J. Veillet, H. Annoni, G. Bellini, M. di Corato, E. Fiorini, K. Moriyasu, P. Negri, M. Rollier, H. H. Bingham, C. W. Farwell andW. B. Fretter:Phys. Lett.,28 B, 208 (1968).
H. H. Bingham, C. W. Farwell, W. B. Fretter, G. M. Irwin, S. Kahn, A. Lu, B. Daugeras, D. Fournier, J. Hennessy, M. Novak, J. J. Veillet, A. M. Cnops, F. R. Huson, R. I. Louttit, D. J. Miller, J. S. O'Neall, M. Di Corato, M. Rollier, C. Bouthet, J. Crussard andJ. Ginestet:Nucl. Phys.,52 B, 31 (1973).
J. Bartsch, G. Kraus, P. Lauscher, P. Schmitz, A. Meyer, H. Schiller, K. Böckmann, H. Plothow, E. Propach, M. Rost, K. W. J. Barnham, V. T. Cocconi, P. Duinker, G. Kellner, W. Kittel, D. R. O. Morrison, D. Sotiriou andH. Wahl:Nucl. Phys.,46 B, 46 (1972).
R. Arnold, J. P. Engel, B. Escoubes, N. Kurtz, A. Lloret, M. Paty, J. L. Riester andS. de Unamuno:Lett. Nuovo Cimento 6, 707 (1973).
R. Arnold, B. Escoubes, N. Kurtz, A. Lloret, M. Paty, J. L. Riester, S. de Unamuno, T. Gemesy, V. Janossy, S. Krasznovszky, G. Pinter, N. Posch andF. Telbisz:Phys. Lett.,36 B, 261 (1971).
G. Ascoli, D. V. Brockway, L. Eisenstein, M. L. Ioffredo, U. E. Kruse, P. F. Schultz, C. Caso, G. Tomasini, P. Von Handel, P. Schilling, G. Costa, S. Ratti, P. Daronian, L. Mosca, A. E. Brenner, W. C. Harrison, D. Heyda, W. H. Johnson jr,J. K. Kim, M. E. Law, J. E. Mueller, B. M. Salzberg, L. K. Sisterson, T. F. Johnston, J. D. Prentice, N. R. Steenberg, T. S. Yoon, J. T. Carroll, A. R. Erwin, R. Morse, B. Y. Oh, W. Robertson andW. D. Walker:Phys. Rev. Lett.,26, 929 (1971).
B. Dagueras, R. Huson, H. J. Lubatti, J. Six, J. J. Weillet, H. Annoni, K. Moriyasu, M. Rollier, H. H. Bingham, C. W. Farwell andW. B. Fretter:Phys. Lett.,27 B, 332 (1968).
R. J. Glauber: inHigh-Energy Physics and Nuclear Structure (Amsterdam, 1967); id. (1969).
J. S. Trefil:Phys. Rev. Lett.,23, 1075 (1969);Phys. Rev.,180, 1366 (1969).
C. Bemporad, W. Beusch, A. C. Melissinos, E. Polgar, D. Websdale, J. D. Wilson, J. P. Dufey, K. Freudenreich, R. Frosch, F. W. Gentit, P. Muhlemann, J. Codling, J. G. Lee, M. Letheren, G. Bellini, G. Di Corato andG. Vegni:Nucl. Phys.,33 B, 397 (1971).
L. Van Hove:Nucl. Phys.,46 B, 75 (1972).
Author information
Authors and Affiliations
Additional information
To speed up publication, the authors of this paper have agreed to not receive the proofs for correction.
Traduzione a cura della Redazione.
Rights and permissions
About this article
Cite this article
Arnold, R., Engel, J.P., Escoubes, B. et al. Coherent production of 2, 3, 4 and 5 π-mesons by π+-Nuclei interactions at 11.7 GeV/cinteractions at 11.7 GeV/c. Nuov Cim A 17, 393–410 (1973). https://doi.org/10.1007/BF02787748
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02787748