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

LANDE 1956

Lande, K.; Booth, E.T.; Impeduglia, J.; Lederman, L.M.; Chinowsky, W.;
Observation of Long-Lived V Particles
Phys. Rev. 103 (1956) 1901;

Reprinted in
R. N. Cahn and G. Goldhaber, The Experimental Foundations of Particle Physics, Cambridge Univ. Press (1991) 205.
The Physical Review - the First Hundred Years, AIP Press (1995) 854.

The application of rigorous charge conjugation invariance to strange particle interactions has led to the prediction of rather startling properties for the 0-meson state. Some of these are:
(I) the existence of a second neutral particle, 02, for which two-pion decay is prohibited;
(II) the consequent existence of a second lifetime, considerably longer than that for two-pion decay of the 01 ( ~ 1 x 10-10 sec);
(III) a complicated time dependence for the nuclear interaction properties. The only additional assumption in this "particle mixture'' theory is the nonidentity of 0 and its antiparticle.
These theoretical considerations have stimulated us to undertake a search for long-lived neutral particles. To this end, the Columbia 36-in. magnet cloud chamber was exposed to the neutral radiation emitted from a copper target at an angle of 68 to the 3 BeV external proton beam of the Brookhaven Cosmotron. (Extracted from the introductory part of the paper.).

Accelerator BNL-COSMOTRON Detectors CLOUD

Related references
See also
M. Gell-Mann and A. Pais, Phys. Rev. 97 (1955) 1387;
A. Pais and O. Piccioni, Phys. Rev. 100 (1955) 932;
G. Snow, Phys. Rev. 103 (1956) 1111;
S. B. Treiman and R. G. Sachs, Phys. Rev. 103 (1956) 1545;
K. M. Case, Phys. Rev. 103 (1956) 1449;
Slaughter, M. M. Block, and Harth, Bull.Am.Phys.Soc. 1 (1956) 186;
Blumenfeld, N. E. Booth, L. M. Lederman, and W. Chinowsky, Phys. Rev. 102 (1956) 1184;
M. M. Block, Harth, and R. M. Sternheimer, Phys. Rev. 100 (1955) 324;
T. D. Lee and C. N. Yang, Phys. Rev. 102 (1956) 290;
Kadyk, G. H. Trilling, R. B. Leighton, and C. D. Anderson, Bull.Am.Phys.Soc. 1 (1956) 251;
J. Ballam, Grisaru, and S. B. Treiman, Phys. Rev. 101 (1956) 1438;
O. Piccioni et al., Rev. Sci. Inst. 26 (1955) 232;

  p Cu neutral X 3 GeV (Tlab) angp
  Ko + o

Particles studied
  KL ex

Record comments
First evidence for the KL.
  New Comments List of Comments