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

FITCH 1956

Fitch, V.L.; Motley, R.;
Mean Life of K+ Mesons
Phys. Rev. 101 (1956) 496;

Currently the best evidence supports the view that there are at least two types of K-mesons in the mass range of 900 to 1000 me. The meson appears not to have both the spin and parity of the K 2 when the experimental data on decay are compared with the analysis of Dalitz. On the other hand, there is good evidence from range and momentum measurements on the parent particle and from Q-value measurements that the masses of the K 2, the K 2 and are the same to within one percent. This situation has led us to investigate the lifetime of the K+-meson as a function of its decay mode. Except in the case of decay, previous measurements of the lifetime were made irrespective of the decay mode. These are summarized in the report of the Pisa Conference. This letter reports the results of measurements made on the decay of the K 2+ + and K 2+ + 0. (Extracted from the introductory part of the paper.).

Accelerator BNL-COSMOTRON Detectors CNTR

Data comments
246 K+ + o, and 393 K+ + .

  K+ + o 465 MeV (Plab)
  K+ + 465 MeV (Plab)

Particles studied
  K+ w

Record comments
Confirmation of the equality of the lifetimes of K+ and (K+ + o) mesons.
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