Summary
The apparent inconsistency among threshold pion interactions is resolved by the use of extrapolation procedures for charge exchange and photoproduction amplitudes more in accord with theory than conventional linear extrapolations.
Riassunto
Si fa vedere che l’apparente inconsistenza tra interazioni di pioni a bassa energia può venire risolta se si fa uso di estrapolazioni suggerite dalla teoria per i processi di scambio carica e di fotoproduzione invece delle solite estrapolazioni lineari.
Similar content being viewed by others
References
H. Bethe andF. de Hoffmann:Mesons and Fields (Evanston), Vol. II:a) p. 99;b) p. 174.
J. M. Cassels:Proceedings 7th Rochester Conference, (1957), Sect. II, p. 1;J. M. Cassels, G. Fidecaro, A. M. Wetherell andJ. R. Wormald:Proc. Phys. Soc., A70, 405 (1957).
A. M. Baldin:Nuovo Cimento,8, 569 (1958).
See ref. (2).
J. Orear:Nuovo Cimento,4, 856 (1957).
G. Bernardini andE. L. Goldwasser:Phys. Rev.,49, 729 (1954);95, 857 (1954).
M. Beneventano, G. Bernardini, D. Carlson Lee, G. Stoppini andL. Tau:Nuovo Cimento,4, 323 (1956).
G. F. Chew, M. L. Goldberger, F. Low andY. Nambu:Phys. Rev.,106, 1345 (1057).
G. F. Chew andF. Low:Phys. Rev.,101, 1579 (1956). The importance of this term in the analysis of photoproduction of charged pions has been stressed byM. J. Moravcsik:Phys. Rev.,104, 1451 (1956).
G. F. Chew:Phys. Rev.,95, 1669 (1954).
J. H. Malmberg andC. S. Robinson:Phys. Rev.,109, 158 (1958);E. Knapp, W. Imhof, R. W. Kenney andPerez Mendez:Phys. Rev.,107, 323 (1957).
N. Kroll andM. Ruderman:Phys. Rev.,93, 233 (1954).
J. E. Leiss, C. S. Robinson andS. Penner:Phys. Rev.,98, 201 (1955).
The deuterium π−/π+ ratio experiments and Baldin’s analysis are not in complete agreement at slightly higher energies, according toBernardini (private communication), but the extrapolation to 1.87 at threshold does not seem to be justified.
G. Chew, M. L. Goldberger, F. Low andY. Nambu:Phys. Rev.,106, 1337 (1957); cf. also:R. Oehme:Phys. Rev.,10, 1503 (1955);102, 1174 (1956);A. Salam:Proceedings CERN Conf. (1956), p. 176.
M. Cini andS. Fubini:Nuovo Cimento,3, 764 (1956).
G. Puppi andA. Stanghellini:Nuovo Cimento,5, 1305 (1957).
A. I. Mukhin et al.:Proc. CERN Conf. (1956), p. 204;G. Ferrari et al.:Proc. CERN Conf. (1956), p. 230;M. H. Alston et al.:Proc. CERN Conf., (1956), p. 236;D. E. Nagle et al.:Proc. CERN Conf. (1956), p. 238.
W. Spry:Phys. Rev.,95, 1295 (1954);
J. Tinlot andA. Roberts:Phys. Rev.,95, 137 (1954).
D. Bodansky, A. Sachs andJ. Steinberger:Phys. Rev.,93, 1367 (1954).
A. M. Baldin andP. K. Kabir:Nuovo Cimento,9, 547 (1958).
Author information
Authors and Affiliations
Additional information
On sabbatical leave from the University of Illinois with grants from Guggenheim Foundation and Fulbright Program.
Rights and permissions
About this article
Cite this article
Cini, M., Gatto, R., Goldwasser, E.L. et al. A note on the apparent inconsistency among measurements of threshold pion interactions. Nuovo Cim 10, 243–258 (1958). https://doi.org/10.1007/BF02732482
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02732482