Chronology of Milestone Events in Particle Physics - EDWARDS 1958
Chronology of Milestone Events in Particle Physics


Edwards, B.; Losty, J.; Perkins, D.H.; Pinkau, K.; Reynolds, J.;
Analysis of Nuclear Interactions of Energies between 1000 and 100000 BeV
Phil. Mag. (7)3 (1958) 237;

Twenty nuclear interactions produced by protons and ten produced by -particles of energy above 1000 BeV have been analysed.
The proportion of pions among the secondaries is found to be 80% for the core and less than 70% for the wide angle tracks. The average transverse momentum resulting from our measurements is PT = 0.5 BeV/c for pions and PT = 1-2 BeV/c for heavy particles. It appears to be independent of angle of emission and primary energy. The multiplicity of the interaction, ns shows no variation with primary energy: it varies, however, with the anisotropy of the angular distribution, and shows wide fluctuations at a fixed primary energy. The inelasticity, K, of the collisions is close to unity for secondary interactions of mean energy ~ 100 BeV and about 0.2 for jets produced by protons of energy ~ 100000 BeV. At a fixed energy, K does not appear to be strongly dependent on nS. None of the current theories appears capable of giving a satisfactory explanation of the experimental results, and an alternative model is proposed.

Accelerator COSM Detectors EMUL

Related references
See also
E. Fermi, Progr. of Theor. Phys. 5 (1950) 570;
K. Pinkau, Phil. Mag. 2 (1957) 1389;
H. W. Lewis, J. R. Oppenheimer, and S. A. Wouthuysen, Phys. Rev. 73 (1948) 127;
C. Castagnoli et al., Nuovo Cim. 10 (1956) 1539;
G. Cocconi, Phys. Rev. 93 (1954) 1107;
R. R. Daniel, J. H. Davies, J. H. Mulvey, and D. H. Perkins, Phil. Mag. 43 (1952) 753;
B. Edwards, A. Eglier, M. W. Friedlander, and A. A. Kamal, Nuovo Cim. 5 (1957) 1188;
F. Roesler and C. B. A. McCusker, Nuovo Cim. 10 (1953) 127;
R. G. Glasser, D. M. Haskin, M. Schein, and J. J. Lord, Phys. Rev. 99 (1955) 1555;
W. Heisenberg, Z. Phys. 133 (1953) 65;
W. L. Kraushaar and L. J. Marks, Phys. Rev. 93 (1954) 326;
L. D. Landau, Doklady Akad. Nauk SSSR 87 (1953) 51;
Analyse data from
F. A. Brisbout et al., Phil. Mag. 1 (1956) 605;
H. J. Bhabha, Proc. Roy. Soc. A219 (1953) 293;
W. H. Barkas et al., Phys. Rev. 105 (1957) 1037;

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Evidence for limited transverse momenta in hadronic jets.
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