Chronology of Milestone Events in Particle Physics - CHUPP 1955
Chronology of Milestone Events in Particle Physics

CHUPP 1955

Chupp, W.W.; Goldhaber, G.; Goldhaber, S.; Johnson, W.R.; Lannutti, J.E.;
K-Meson Mass from K-Hydrogen Scattering Event
Phys. Rev. 99 (1955) 1042;

Summary
One of the basic problems in the classification and understanding of K-mesons is the relation between the various modes of decay (K 2 = +, K 2, K 3, Ke 3, and ). There has been much discussion recently on the K-meson mass and to what extent the masses of the various K-mesons (or perhaps just different decay modes) differ from that of the meson (965.3 me).
In this connection, we want to report here on a KL+-particle which underwent a scattering from hydrogen in a nuclear emulsion stack and thus enabled us to obtain a rather good mass measurement. The mass value obtained as the weighted mean of two independent methods is 973 12 me. (Extracted from the introductory part of the paper.).

Accelerator LBL Detectors EMUL

Related references
See also
L. T. Kerth et al., Bull.Am.Phys.Soc. 30 (1955) 41;
J. R. Fleming and J. J. Lord, Phys. Rev. 92 (1953) 511;
R. M. Sternheimer, Phys. Rev. 91 (1953) 256;

Reactions
  K+ p p K+ 399.-423. MeV (Plab) p

Particles studied
  K+ mass

Record comments
First precise measurement of the K+ mass.
    
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