Summary
It is shown that the ϱ-mesonic final-state interaction could give rise to the observed asymmetries in the η0 → 3π decay. A dynamical model is presented which explains both the branching ratioP(η0→3π0)/P(η0→π+)+π-+π0) and the existence of a large asymmetric component in the (η0→π+)+π-+π0) decay. The model predicts a relatively small symmetric constant amplitude. It is shown that, in this model, the symmetric constant amplitude vanishes in the limit of the exact 8U3 symmetry and of a constant η-π coupling. A similar discussion is given for the K → 3π decay. Possible effects of the σ0 dipion are also discussed.
Riassunto
Si dimostra che l’interazione dello state finale p-mesonico può dar luogo alle simmetrie osservate nel decadimento η0 → 3π. Si presenta un modello dinamico che spiega sia il rapporte di suddivisioneP(η0→3π0)/P(η0→π+)+π-+π0) e l’esistenza di una grande componente asimmetrica nel decadimento (η0→π+)+π-+π0) Il modello predice un’ampiezza costante simmetrica relativamente piccola. Si dimostra che, in questo modello, l’ampiezza costante simmetrica tende a zero al limite dell’esatta simmetriaSU3 e di un coatante accoppiamento η-π. Si esprme una simile disenssione per il decadimento K-3πT. Si discutono anche i possibili effetti del.dipione σ0.
Similar content being viewed by others
References
D. Berley, D. Colley andJ. Schultz:Phys. Rev. Lett.,10, 114 (1963). Earlier data are cited here.
G. Barton andS. P. Rosen:Phys. Rev. Lett.,8, 414 (1962);M. A. B. Beg:Phys. Rev. Lett.,9, 67 (1962);K. C. Wali:Phys. Rev. Lett.,9, 120 (1962);C. Kacser:Phys. Rev.,130, 355 (1963).
P. C. Crawford jr.,J. Lloyd andF. C. Fowler:Phys. Rev. Lett.,10, 546 (1963);F. S. Crawford, jr., R. A. Grossman, L. J. Lloyd, L. R. Price andE. C. Fowler:Phys. Rev. Lett.,11, 564 (1963);E. C. Fowler, F. S. Crawford, jr., L. J. Lloyd, R. A. Grossman andL. Price:Phys. Rev. Lett.,10, 110 (1963.
L. M. Brown andP. Singer:Phys. Rev. Lett.,8, 460 (1962); andPhys. Rev.,133, B 812 (1964).
For instance,N. P. Samios, A. H. Bachman, R. M. Lea, T. E. Kalogeropoulos andW. D. Shephard:Phys. Rev. Lett.,9, 139 (1962);J. Kirz, J. Schwartz andR. D. Tripp:Phys. Rev.,130, 2481 (1963).
C. Alff, D. Berley, D. Colley, N. Gel’fand, U. Nauenberg, D. Miller, J. Schultz, J. Steinberger, T. H. Tan, H. Brugger, P, Kramer andR. Plano:Phys. Rev. Lett.,9, 322 (1962).
See, for instance,S. Okubo andB. Sakita:Phys. Rev. Lett.,11, 50 (1963); Riazuddin and-Fayyazuddin:Phys. Rev.,123, 2337 (1963).
S. Hori, S. Oneda, S. Chiba andA. Wakasa:Phys. Lett.,5, 339 (1963).
See, however,B. Barret andG. Barton:Phys. Rev.,133, B 466 (1964);E. Eborlo andS. Iwao: preprint.
G. Von Dardel, D. Dakkers, R. Mermod, J. D. van Putten, M. Vivargent, G. Weber andK. Winter:Phys. Lett.,4, 51 (1963). Earlier experiments gave values about twice larger:R. G. Glasser, N. Seeman andB. Stiller:Phys. Rev.,123, 1014 (1961);R. F. Blackie, A. E. Engler andJ. H. Mulvey:Phys. Rev. Lett.,5, 384 (1960).
S. Oneda andY. S. Kim: University of Maryland Technical Report no. 357.
S. Oneda andJ. C. Pati: unpublished.
Author information
Authors and Affiliations
Additional information
Work supported in part by the U.S. Air Force and the National Science Foundation.
Rights and permissions
About this article
Cite this article
Oneda, S., Kim, Y.S. & Kaplan, L.M. Final-state interactions in η0 → 3π decay. Nuovo Cim 34, 655–664 (1964). https://doi.org/10.1007/BF02750008
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02750008