Chronology of Milestone Events in Particle Physics - ALVAREZ 1959
Chronology of Milestone Events in Particle Physics

ALVAREZ 1959

Alvarez, L.W.; Eberhard, P.H.; Good, M.L.; Graziano, W.; Ticho, H.K.; Wojcicki, S.G.;
Neutral Cascade Hyperon Event
Phys. Rev. Lett. 2 (1959) 215;

Motivation
The existence of a neutral cascade hyperon o has been predicted theoretically, on the basis of the strangeness theory of Gell-Mann and Nishijima, as the neutral counterpart of the negative cascade hyperon, , which decays by .
In an attempt to establish the existence of this particle the Lawrence Radiation Laboratory 15-in. hydrogen bubble chamber was operated in a separated beam of (1.15 0.02) BeV/ c K mesons produced by the Bevatron. (Extracted from the introductory part of the paper.).

Accelerator LBL Detectors HBC-15IN

Related references
See also
P. Nordin et al., Phys. Rev. Lett. 1 (1958) 380;
A. H. Rosenfeld et al., Phys. Rev. Lett. 2 (1959) 112;
M. Gell-Mann and A. H. Rosenfeld, Ann. Rev. Nucl. Sci. 7 (1957) 410;
M. Gell-Mann, Nuovo Cim. Suppl. 4 (1956) 848;
F. S. Crawford et al., Phys. Rev. Lett. 2 (1959) 110;
R. Armenteros et al., Phil. Mag. 43 (1952) 597;
C. Franzinetti, G. Morpurgo, Nuovo Cim. Suppl. 6 (1957) 565;
C. A. Coombes et al., Phys. Rev. 112 (1958) 1303;
F. S. Crawford et al., Phys. Rev. Lett. 1 (1958) 377;
K. Nishijima, Progr. of Theor. Phys. 13 (1955) 285;

Reactions
  K p 2vee 1.15 GeV (Plab) mass
  K p o KS 1.15 GeV (Plab) p, cs
  p
  KS +
  o neutral

Particles studied
  o ex, mass, qn

Record comments
First evidence for the o.
    
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