Chronology of Milestone Events in Particle Physics - BROWN 1962
Chronology of Milestone Events in Particle Physics

BROWN 1962

Brown, H.N.; Culwick, B.B.; Fowler, W.B.; Gailloud, M.; Kalogeropoulos, T.E.; Kopp, J.K.; Lea, R.M.; Louttit, R.I.; Morris, T.W.; Shutt, R.P.; Thorndike, A.M.; Webster, M.S.; Baltay, C.; Fowler, E.C.; Sandweiss, J.; Sanford, J.R.; Taft, H.D.;
Observation of Production of a + Pair
Phys. Rev. Lett. 8 (1962) 255;

The reaction p + has been observed in a 20-in. liquid hydrogen bubble chamber exposed to a separated antiproton beam of 3.3 BeV/c momentum produced in a tungsten target in the Brookhaven alternating gradient synchrotron. While expected to exist, the + has so far not been observed, partially because the cross section for production is small in comparison with the production of other hyperons, and partially because beams of high enough energy have been available only recently. Both cascade hyperons decay in the visible region of the chamber, as does the antilambda from the + decay. (Extracted from the introductory part of the paper.).

Accelerator BNL Detectors HBC-20IN

Related references
Superseded by
C. Baltay et al., Phys. Rev. 140 (1965) B1027;

Experiment comments
34000 pictures.

  p + 3.3 GeV (Plab) cs

Particles studied
  + ex, mass

Record comments
First evidence for + pair production.
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