Measurement of the Branching Ratio <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi>K</mi></mrow><mrow><mi>L</mi></mrow><mrow></mrow><mrow></mrow><mrow><mn>0</mn></mrow><mprescripts></mprescripts></mmultiscripts></mrow><mo>→</mo><mfrac><mrow><mn>2</mn><mrow><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></mrow><mrow><mrow><mmultiscripts><mrow><mi>K</mi></mrow><mrow><mi>L</mi></mrow><mrow></mrow><mrow></mrow><mrow><mn>0</mn></mrow><mprescripts></mprescripts></mmultiscripts></mrow></mrow></mfrac><mo>→</mo><mn>3</mn><mrow><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math></span>

R. J. Cence; B. D. Jones; V. Z. Peterson; V. J. Stenger; J. Wilson; D. Cheng; R. D. Eandi; R. W. Kenney; I. Linscott; W. P. Oliver; S. Parker; C. Rey

doi:10.1103/PhysRevLett.22.1210

Measurement of the Branching Ratio $K_{L}^{0} \to \frac{2 π^{0}}{K_{L}^{0}} \to 3 π^{0}$

R. J. Cence, B. D. Jones, V. Z. Peterson, V. J. Stenger, and J. Wilson

D. Cheng^*, R. D. Eandi^†, R. W. Kenney, I. Linscott, W. P. Oliver, S. Parker, and C. Rey

Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii

Lawrence Radiation Laboratory, University of California, Berkeley, California 94720

^*Now at Brookhaven National Laboratory, Upton, N. Y.
^†Now at National Aeronautics and Space Administration, Manned Space Center, Houston, Tex.

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Phys. Rev. Lett. 22, 1210 – Published 2 June, 1969

DOI: https://doi.org/10.1103/PhysRevLett.22.1210

Abstract

The rate of the $CP$ -nonconserving decay $K_{L}^{0} \to 2 π^{0}$ has been measured relative to that of $K_{L}^{0} \to 3 π^{0}$ using a monoenergetic $K$ beam and a nearly $4 π$ solid-angle detector system employing lead-plate spark chambers and shower counters. The measured branching ratio 1.31% ± 0.18% (statistical) ±25% (systematic) leads to a value for the $CP$ -nonconservation parameter ${| η_{00} |}^{2}$ of (14.1 ±3.4) × $10^{- 6}$ .

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Measurement of the Branching Ratio $K_{L}^{0} \to \frac{2 π^{0}}{K_{L}^{0}} \to 3 π^{0}$

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Measurement of the Branching Ratio KL0→2π0KL0→3π0

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Measurement of the Branching Ratio $K_{L}^{0} \to \frac{2 π^{0}}{K_{L}^{0}} \to 3 π^{0}$