New limit on <span class="aps-inline-formula"><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><mo>→</mo><mrow><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span>

A. Barker; R. A. Briere; L. K. Gibbons; G. Makoff; V. Papadimitriou; J. R. Patterson; S. Somalwar; Y. W. Wah; B. Winstein; R. Winston; M. Woods; H. Yamamoto; E. C. Swallow; G. J. Bock; R. Coleman; J. Enagonio; Y. B. Hsiung; R. Tschirhart; K. Stanfield; R. Stefanski; T. Yamanaka; G. D. Gollin; M. Karlsson; J. K. Okamitsu; P. Debu; B. Peyaud; R. Turlay; B. Vallage

doi:10.1103/PhysRevD.41.3546

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New limit on $K_{L} \to π^{0} e^{+} e^{-}$

A. Barker, R. A. Briere, L. K. Gibbons, G. Makoff, V. Papadimitriou, J. R. Patterson, S. Somalwar, Y. W. Wah, B. Winstein et al.

E. C. Swallow

G. J. Bock, R. Coleman, J. Enagonio, Y. B. Hsiung, R. Tschirhart, K. Stanfield, R. Stefanski, and T. Yamanaka

G. D. Gollin^†, M. Karlsson, and J. K. Okamitsu^‡

P. Debu, B. Peyaud, R. Turlay, and B. Vallage

R. Winston, M. Woods^*, and H. Yamamoto

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

Department of Physics, Elmhurst College, Elmhurst, Illinois 60126
The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637

Fermi National Accelerator Laboratory, Batavia, Illinois 60510

Department of Physics, Princeton University, Princeton, New Jersey 08544

Department de Physiques des Particules Elementaires, Centre d'Etudes Nucleaires de Saclay, F-91191 Gif-sur-Yvette CEDEX, France

^*Present address: SLAC, Stanford, CA 94305.
^†Present address: Department of Physics, University of Illinois, Urbana, IL 61801.
^‡Present address: Princeton Combustion Research Laboratories, Monmouth Junction, NJ 08852.

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Phys. Rev. D 41, 3546(R) – Published 1 June, 1990

DOI: https://doi.org/10.1103/PhysRevD.41.3546

Abstract

Based upon the analysis of the complete data set of Fermilab experiment E-731, we report a new limit on the branching ratio of $K_{L} \to π^{0} e^{+} e^{-}$ which is <7.5× $10^{- 9}$ (90% confidence).

References (7)

J. F. Donoghue, B. R. Holstein, and G. Valencia, Phys. Rev. D 35, 2769 (1987) L. M. Sehgal, ibid. 38, 808 (1988) G. Ecker, A. Pich, and E. deRafael, Nucl. Phys. B303, 665 (1988) C. O. Dib, I. Dunitz, and F. Gilman, Phys. Rev. D 39, 2639 (1989) J. Flynn and L. Randall, Phys. Lett. B 216, 221 (1989)
L. K. Gibbons et al., Phys. Rev. Lett. 61, 2661 (1988)
G. D. Barr et al., Phys. Lett. B 214, 303 (1988)
A. Barker et al., Fermilab Proposal No. E-799, 1989 (unpublished)
J. R. Patterson et al., Phys. Rev. Lett. 64, 1491 (1990) H. Burkhardt et al., Phys. Lett. B 206, 169 (1988)
J. R. Patterson, Ph.D. thesis, University of Chicago, 1990
M. Schmidt et al., in Proceedings of the Meeting of the APS Division of Particles and Fields, Houston, Texas, 1990 (unpublished) K. E. Ohl et al., Yale University report (unpublished)

[c1] J. F. Donoghue, B. R. Holstein, and G. Valencia, Phys. Rev. D 35, 2769 (1987) L. M. Sehgal, ibid. 38, 808 (1988) G. Ecker, A. Pich, and E. deRafael, Nucl. Phys. B303, 665 (1988) C. O. Dib, I. Dunitz, and F. Gilman, Phys. Rev. D 39, 2639 (1989) J. Flynn and L. Randall, Phys. Lett. B 216, 221 (1989)

[c2] L. K. Gibbons et al., Phys. Rev. Lett. 61, 2661 (1988)

[c3] G. D. Barr et al., Phys. Lett. B 214, 303 (1988)

[c4] A. Barker et al., Fermilab Proposal No. E-799, 1989 (unpublished)

[c5] J. R. Patterson et al., Phys. Rev. Lett. 64, 1491 (1990) H. Burkhardt et al., Phys. Lett. B 206, 169 (1988)

[c6] J. R. Patterson, Ph.D. thesis, University of Chicago, 1990

[c7] M. Schmidt et al., in Proceedings of the Meeting of the APS Division of Particles and Fields, Houston, Texas, 1990 (unpublished) K. E. Ohl et al., Yale University report (unpublished)

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New limit on $K_{L} \to π^{0} e^{+} e^{-}$

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New limit on KL→π0e+e−

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New limit on $K_{L} \to π^{0} e^{+} e^{-}$