Measurement of the Ratio <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mfrac><mrow><mi>Γ</mi><mo>(</mo><mrow><msub><mrow><mi>K</mi></mrow><mrow><mi>L</mi></mrow></msub></mrow><mo>→</mo><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mo>)</mo></mrow><mrow><mi>Γ</mi><mo>(</mo><mrow><msub><mrow><mi>K</mi></mrow><mrow><mi>L</mi></mrow></msub></mrow><mo>→</mo><mi>π</mi><mi>l</mi><mi>ν</mi><mo>)</mo></mrow></mfrac></math> for <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>K</mi></mrow><mrow><mi>L</mi></mrow></msub></mrow></math> with 65 GeV/c Laboratory Momentum

D. P. Coupal; R. H. Bernstein; G. J. Bock; D. Carlsmith; J. W. Cronin; G. D. Collin; Wen Keling; K. Nishikawa; H. W. M. Norton; B. Winstein; B. Peyaud; R. Turlay; A. Zylberstejn

doi:10.1103/PhysRevLett.55.566

Measurement of the Ratio $\frac{Γ (K_{L} \to π^{+} π^{-})}{Γ (K_{L} \to π l ν)}$ for $K_{L}$ with 65 GeV/c Laboratory Momentum

D. P. Coupal, R. H. Bernstein, G. J. Bock, D. Carlsmith, J. W. Cronin, G. D. Collin, Wen Keling, K. Nishikawa, H. W. M. Norton, B. Winstein, B. Peyaud, R. Turlay, and A. Zylberstejn

Phys. Rev. Lett. 55, 566 – Published 5 August 1985; Erratum Phys. Rev. Lett. 55, 1430 (1985)

Abstract

We have measured the ratio $\frac{Γ (K_{L} \to π^{+} π^{-})}{Γ (K_{L} \to π l ν)}$ to be (3.13 ± 0.14) × $10^{- 3}$ For $K_{L}$ with a mean laboratory momentum of 65 GeV/c. This value corresponds to the $CP$ -nonconservation parameter $| η_{+ -} | = (2.28 \pm 0.06) \times 10^{- 3}$ , and is consistent with the world average $| η_{+ -} | = (2.274 \pm 0.022) \times 10^{- 3}$ which is derived from measurements with $K_{L}$ laboratory momenta less than 10 GeV/c. In this experiment we find no evidence for an energy dependence of $| η_{+ -} |$ .

Received 6 May 1985

DOI:https://doi.org/10.1103/PhysRevLett.55.566

Erratum

Measurement of the Ratio $\frac{Γ (K_{L} \to π^{+} π^{-})}{Γ (K_{L} \to π l ν)}$ for $K_{L}$ with 65 GeV/c Laboratory Momentum

D. P. Coupal, R. H. Bernstein, G. J. Bock, D. Carlsmith, J. W. Cronin, G. D. Gollin, Wen Keling, K. Nishikawa, H. W. M. Norton, B. Winstein, B. Peyaud, R. Turlay, and A. Zylberstejn

Phys. Rev. Lett. 55, 1430 (1985)

Authors & Affiliations

D. P. Coupal^*, R. H. Bernstein^†, G. J. Bock^‡, D. Carlsmith^§, J. W. Cronin, G. D. Collin^∥, Wen Keling^¶, K. Nishikawa, H. W. M. Norton^**, and B. Winstein

The Enrico Fermi Institute and the Department of Physics, The University of Chicago, Chicago, Illinois 60637

B. Peyaud, R. Turlay, and A. Zylberstejn

Département de Physique des Particules Elementaires, Centre d'Etudes Nucléaires, Saclay F-91191, Gif-sur-Yvette Cédex, France

^*Present address: Stanford Linear Accelerator Center, Stanford, Calif. 94305.
^†Present address: Nevis Laboratories, Irvington-on-Hudson, N. Y. 10533.
^‡Present address: Fermilab, Batavia, Ill. 60510.
^§Present address: Department of Physics, University of Wisconsin, Madison, Wis. 53706.
^∥Present address: Department of Physics, Princeton University, Princeton, N. J. 08544.
^¶Present address: Institute of High Energy Physics, Academia Sinica, Beijing, People's Republic of China.
^**Present address: Lazard Freres Co., New York, N.Y. 10020.

References (Subscription Required)

Click to Expand

Issue

Vol. 55, Iss. 6 — 5 August 1985

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters

Measurement of the Ratio Γ(KL→π+π−)Γ(KL→πlν) for KL with 65 GeV/c Laboratory Momentum

D. P. Coupal, R. H. Bernstein, G. J. Bock, D. Carlsmith, J. W. Cronin, G. D. Collin, Wen Keling, K. Nishikawa, H. W. M. Norton, B. Winstein, B. Peyaud, R. Turlay, and A. Zylberstejn

Phys. Rev. Lett. 55, 566 – Published 5 August 1985; Erratum Phys. Rev. Lett. 55, 1430 (1985)

Abstract

Erratum

Measurement of the Ratio Γ(KL→π+π−)Γ(KL→πlν) for KL with 65 GeV/c Laboratory Momentum

D. P. Coupal, R. H. Bernstein, G. J. Bock, D. Carlsmith, J. W. Cronin, G. D. Gollin, Wen Keling, K. Nishikawa, H. W. M. Norton, B. Winstein, B. Peyaud, R. Turlay, and A. Zylberstejn

Phys. Rev. Lett. 55, 1430 (1985)

Authors & Affiliations

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

Measurement of the Ratio $\frac{Γ (K_{L} \to π^{+} π^{-})}{Γ (K_{L} \to π l ν)}$ for $K_{L}$ with 65 GeV/c Laboratory Momentum

Measurement of the Ratio $\frac{Γ (K_{L} \to π^{+} π^{-})}{Γ (K_{L} \to π l ν)}$ for $K_{L}$ with 65 GeV/c Laboratory Momentum