Summary
In connection with the proposals of Gell-Mann and Zweig on the possible origin of theSU 3 symmetry, an experiment has been designed which is able to detect particles with electric charges 2/3 in the cosmic radiation. The upper limit established by the present experiment is: quark per minimum ionizing incident particle ≤3·10−6 with 90% confidence level.
Riassunto
In relazione al suggerimento di Gell-Mann e Zweig sulla possibile origine della simmetriaSU 3 è stato progettato un experimento capace di rivelare particelle con carica elettrica 2/3 nella radiazione cosmica. Il limite superiore raggiunto dai risultati sperimentali ottenuti è: quark per particella relativistica incidente ≤3·10−6 con un livello di fiducia del 90%.
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References
M. Gell-Mann:Phys. Lett.,8, 214 (1964).
G. Zweig: CERN Report 8419/Th. 412 (1964) (unpublished). See alsoA. Peterman:Nucl. Phys.,63, 349 (1965).
M. Gell-Mann:The Eightfold Way, California Institute of Technology Synchrotron Laboratory Report, CSTL-20-1961 andPhys. Rev.,125, 1067 (1962);Y. Ne'eman:Nucl. Phys.,26, 222 (1961).
A. W. Sunyar, A. Z. Schwarzschild andP. I. Connors:Phys. Rev.,136, B 1157 (1964).
T. Bowen, D. A. DeLise, R. M. Kalbach andL. B. Mortara:Phys. Rev. Lett.,13, 728 (1964).
D. R. O. Morrison:Phys. Lett.,9, 199 (1964).
H. H. Bingham, M. Dickinson, R. Diebold, W. Koch, D. W. G. Leith, M. Nikolić, B. Ronne, R. Huson, P. Musset andJ. J. Veillet:Phys. Lett.,9, 201 (1964).
L. B. Leipuner, W. T. Chu, R. C. Larsen andR. K. Adair:Phys. Rev. Lett.,12, 423 (1964).
V. Hagopian, W. Selove, R. Ehrlich, E. Leboy, R. Lanza, D. Rahm andM. Webster:Phys. Rev. Lett.,13, 280 (1964).
W. Blum, S. Brandt, V. T. Cocconi, O. Czyzewski, J. Danysz, M. Jobes, G. Kellner, D. Miller, D. R. O. Morrison, W. Neale andJ. G. Rushbrooke:Phys. Rev. Lett.,13, 353a (1964).
P. Franzini, B. Leontic, D. Rahm, N. Samios andM. Schwartz:Phys. Rev. Lett.,14, 196 (1965).
D. E. Dorfan, J. Eades, L. M. Lederman, W. Lee andC. N. Ting:Phys. Rev. Lett.,14, 999 (1965).
D. E. Dorfan, J. Eades, L. M. Lederman, W. Lee, C. C. Ting, P. Piroué, S. Smith, J. L. Brown, J. A. Kadyk andG. H. Trilling:Phys. Rev. Lett.,14, 995 (1965).
V. F. Weisskopf:Knowledge and Wonder (New York, 1962), p. 43.
A. M. Hillas andT. E. Cransiaw:Nature,184, 893 (1959).
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Massam, T., Muller, T. & Zichichi, A. An upper limit to the existence of charges (2/3)e in the cosmic radiation at 500 m above sea level. Nuovo Cimento A (1965-1970) 40, 589–596 (1965). https://doi.org/10.1007/BF02721046
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DOI: https://doi.org/10.1007/BF02721046