Chronology of Milestone Events in Particle Physics - BOLDT 1958B
Chronology of Milestone Events in Particle Physics

BOLDT 1958B

Boldt, E.; Caldwell, D.O.; Pal, Y.;
10-20 Mass Difference
Phys. Rev. Lett. 1 (1958) 150;

Summary
We have observed directly the change with time of the nature of the neutral particle produced in association with the hyperon. The "particle,'' initially the 0, is observed to interact with matter to produce another hyperon only when at some distance from its origin, and never when close to that origin. This observation is a direct confirmation of the particle-mixture theory for the 0 meson of Gell-Mann and Pais, and when quantitatively interpreted in terms of that theory, yields an estimate of the mass difference between the 10 (short-lived) and 20 (long-lived) components of the 0.

Accelerator BNL-COSMOTRON Detectors CLOUD

Related references
See also
W. F. Fry and R. G. Sachs, Phys. Rev. 109 (1958) 2212;
M. Gell-Mann and A. Pais, Phys. Rev. 97 (1955) 1387;

Reactions
  Fe Ko X 1.5 GeV (Elab)
  Ko o
  o nucleus hyperon X

Particles studied
  KL ex, mass
  KS ex, mass

Record comments
First measurement of the KL - KS mass difference.
    
  New Comments List of Comments

djbrucho3@gmail.com NY