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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, K_{e 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 m_e).
In this connection, we want to report here on a K_L⁺-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 m_e. (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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