Chronology of Milestone Events in Particle Physics - ANTIPOV 1970
Chronology of Milestone Events in Particle Physics

ANTIPOV 1970

Antipov, Y.M. et al.
Observation of
Yad. Phys. 12 (1970) 311; Sov. J. Nucl. Phys. 12 (1971) 171;

Abstracts
Observation is reported of nuclei in the beam of negative particles produced by 70 BeV protons in an aluminum target. Among 2.4 x 10 11 particles which passed through the apparatus, five nuclei have been identified on the basis of their electric charge and velocity by means of scintillation and Cerenkov counters. The mass was found to be M = (1.00 0.03)3 mp, and the charge Z = (0.99 0.03)2e. The ratio of the differential cross sections for production of nuclei (p = 20 BeV/c) and - mesons (p = 10 BeV/c) is 2 x 10-11, which corresponds to a production cross section for antihelium 3 of d2/ddp = 2.0 x 10-35 cm2/sr-(BeV/c) per Al nucleus and 2.2 x 10-36 cm2/sr-(BeV/c) per nucleon.

Accelerator SERP Detectors CNTR

Related references
More (later) information appears in
Y. M. Antipov et al., Nucl. Phys. B31 (1971) 235;
See also
B. Cork et al., Phys. Rev. 104 (1956) 1193;
M. Baldo-Ceolin and D. J. Prowse, Bull.Am.Phys.Soc. 3 (1958) 163;
J. Button et al., Phys. Rev. Lett. 4 (1960) 530;
F. Binon et al., Phys. Lett. 30B (1969) 510;
A. Liland and N. P. Pilkuhn, Phys. Lett. 29B (1969) 663;
V. M. Maksimenko, I. N. Sisakian, E. L. Feinberg, and D. S. Chernavsky, Pisma Zh. Eksp. Teor. Fiz. 3 (1966) 340;
D. E. Dorfan et al., Phys. Rev. Lett. 14 (1965) 1003;
Y. M. Antipov et al., Yad. Phys. 10 (1969) 346;
S. V. Donskov et al., Prib.Tech.Exp. 3 (1969) 60;
A. F. Dunaitsev, V. I. Petrukhin, Y. D. Prokoshkin, and V. I. Rykalin, Prib.Tech.Exp. 2 (1965) 114;
Y. B. Bushnin et al., Yad. Phys. 10 (1969) 585;
O. Chamberlain, E. Segrè, C. Wiegand, and T. Ypsilantis, Phys. Rev. 109 (1958) 947;
F. Binon et al., Phys. Lett. 30B (1969) 506;

Reactions
  p Al X 70 GeV (Plab) angp
  p Al X 70 GeV (Plab) angp
  p Al X 70 GeV (Plab) angp

Particles studied
  ex, mass, qn

Record comments
First evidence for production.
    
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