Chronology of Milestone Events in Particle Physics - CORK 1956
Chronology of Milestone Events in Particle Physics

CORK 1956

Cork, B.; Lambertson, G.R.; Piccioni, O.; Wenzel, W.A.;
Antineutrons Produced from Antiprotons in Charge-Exchange Collisions
Phys. Rev. 104 (1956) 1193;

Reprinted in
(translation into Russian) Usp. Fiz. Nauk 62 (1957) 385.
R. N. Cahn and G. Goldhaber, The Experimental Foundations of Particle Physics, Cambridge Univ. Press (1991) 99.
The Physical Review - the First Hundred Years, AIP Press (1995) 858.

The principle of invariance under charge conjugation gained strong support when it was found that the Bevatron produces antiprotons. Another prediction of the same theory which could be tested experimentally was the existence of the antineutron. Additional interest arises from the fact that charge conjugation has somewhat less obvious consequences when applied to neutral particles than it has when applied to particles with electric charge.
The purpose of this experiment was to detect the annihilation of antineutrons produced by charge exchange from antiprotons. (Extracted from the introductory part of the paper.).

Accelerator LBL Detectors CNTR

Related references
Analyse data from
O. Chamberlain, E. Segrè, C. Wiegand, and T. Ypsilantis, Phys. Rev. 100 (1955) 947;
O. Chamberlain et al., Phys. Rev. 102 (1956) 921;
J. M. Brabant et al., Phys. Rev. 101 (1956) 498;

  p Be X 6.2 GeV (Tlab) p
  nucleus X 1.4 GeV (Plab) p
  p annihil
  n annihil

Particles studied

Record comments
First evidence for the antineutron.
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