Summary
The energy dependence of pion proton scattering and K-meson hyperon production cross sections is studied on the basis of a simple model. It is found that the threshold effects can be big enough to be experimentally detectable for the purpose of determining relative hyperon and K-meson parities.
Riassunto
In questo lavoro è stato eseguito lo studio delle sezioni d’urto di scattering pioneprotone e di produzione mesone K-iperone in funzione dell’energia del pione incidente. Dato che gli effetti di soglia risultano cospicui per molti dei casi considerati, esiste la possibilità di determinare sperimentalmente le relative paritàP
ΛΣ e
.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
E. P. Wigner:Phys. Rev.,73, 1002 (1948).
R. K. Adair:Phys. Rev.,111, 632 (1958).
A. N. Baz’ andL. B. Okun’:Sov. Phys. J.E.T.P.,8, 526 (1959);Žurn. Ėksper. Teor. Fiz.,35, 757 (1958).
The following is a condensation of the general argument given in ref. (4); see also ref. (5–7).
R. G. Newton:Phys. Rev.,114, 1611 (1959).
R. G. Newton:Ann. Phys.,4, 29 (1958).
L. Fonda:Nuovo Cimento,13, 956 (1959).
A. I. Baz:Sov. Phys. J.E.T.P.,6, 709 (1958);Žurn. Ėksper. Teor. Fiz.,33, 923 (1959).
F. Eisler, R. Plano, A. Prodell, N. Samios, M. Schwartz, J. Steinberger, P. Bassi, V. Borelli, G. Puppi, H. Tanaka, P. Waloschek, V. Zoboli, M. Conversi, P. Franzini, I. Mannelli, R. Santangelo andV. Silvestrini:Nuovo Cimento,10, 468 (1958).
A. R. Erwin andJ. K. Kopp:Phys. Rev.,109, 1364 (1958).
Since the (ΣK) channel of strangeness zero and total charge zero consists either of Σ−+K+ or of Σ0+K0, the two mass differences almost cancel; according to ref. (10),M Σ--M Σ0 ≈ 6 MeV, and according to ref. (11),M K 0 −M K + ≈ 5 MeV.
For a general discussion of such systems of equations for several channels, see ref. (5,6).
W. H. Barkas andA. H. Rosenfeld:University of California Rad. Lab., Report 8030 (1958).
F. S. Crawford, M. Cresti, M. L. Good, M. L. Stevenson andH. K. Ticho:Phys. Rev. Lett.,2, 112 (1959).
Our notation differs from that in ref. (5) by transposition of all matrices.
For a detailed discussion of such a phenomenon see ref. (12).
L. Fonda andR. G. Newton:Ann. Phys., to be published.
See ref. (12) for an explanation.
Author information
Authors and Affiliations
Additional information
Supported in part by the National Science Foundation.
Rights and permissions
About this article
Cite this article
Fonda, L., Nfwton, R.G. K-hyperon production threshold phenomena. Nuovo Cim 14, 1027–1050 (1959). https://doi.org/10.1007/BF02728179
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02728179