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ALVAREZ 1956

Alvarez, L.W.; Crawford, F.S.; Good, M.L.; Stevenson, M.L.;
Lifetime of K Mesons
Phys. Rev. 101 (1956) 503;

Motivation
Since the various species of K mesons produced at the Bevatron are found to have masses equal within the rather small experimental error, it becomes a critical matter to see if the lifetimes of the different species are different (as one would expect if they have separate identities) or if the lifetimes are all the same (as they would be if there is but one primary K meson which has several alternate modes of decay). This letter describes preliminary results of a counter experiment investigating this point. (Extracted from the introductory part of the paper.).

Accelerator LBL Detectors SPEC, CNTR

Related references
Analyse data from
R. W. Birge et al., Phys. Rev. 99 (1955) 329;
L. W. Alvarez and S. Goldhaber, Nuovo Cim. 2 (1955) 344;
L. T. Kerth, D. H. Stork, R. P. Haddock, and M. M. Whitehead, Phys. Rev. 99 (1955) 641;

Reactions

	K+ 2π+ π–
	K+ π+ πo
	K+ μ+ νμ

Particles studied

K+

w

Record comments
Firm establishment of the K⁺ lifetime value. Establishment of equality of the lifetimes of K⁺ (K⁺ → μ⁺ neutral), Θ (K⁺ → π⁺ π^o), and τ⁺ (K⁺ → π⁺ π⁺ π^–) mesons.

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