Phys. Rev. Lett.
85,
2877–2880
(2000)
Search for Lepton Flavor Violation in K+ Decays into a Charged Pion and Two Leptons
R. Appel et al.
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R. Appel6,3, G. S. Atoyan4, B. Bassalleck2, D. R. Bergman6,*, N. Cheung3, S. Dhawan6, H. Do6, J. Egger5, S. Eilerts2,†, H. Fischer2,‡, W. Herold5, V. V. Issakov4, H. Kaspar5, D. E. Kraus3, D. M. Lazarus1, P. Lichard3, J. Lowe2, J. Lozano6,§, H. Ma1, W. Majid6,**, W. Menzel7,††, S. Pislak8,6, A. A. Poblaguev4, P. Rehak1, A. Sher3, J. A. Thompson3, P. Truöl8,6, and M. E. Zeller6
1Brookhaven National Laboratory, Upton, New York 11973 2Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 3Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 4Institute for Nuclear Research of Russian Academy of Sciences, Moscow 117 312, Russia 5Paul Scherrer Institut, CH-5232 Villigen, Switzerland 6Physics Department, Yale University, New Haven, Connecticut 06511 7Physikalisches Institut, Universität Basel, CH-4046 Basel, Switzerland 8Physik-Institut, Universität Zürich, CH-8057 Zürich, Switzerland
Received 5 June 2000; published in the issue dated 2 October 2000
A search for lepton flavor violating decays, K+→μ+μ+π-, K+→e+e+π-, K+→π+e+μ-, K+→μ+e+π-, and π0→e+μ-, was performed using the data collected in Experiment E865 at the Brookhaven Alternating Gradient Synchrotron. No signal was found in any of the decay modes. At the 90% confidence level, the branching ratios are less than 3.0×10-9, 6.4×10-10, 5.2×10-10, 5.0×10-10, and 3.4×10-9, respectively.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.2877
DOI:
10.1103/PhysRevLett.85.2877
PACS:
13.20.Eb, 11.30.Hv, 14.60.St
*Present address: Rutgers University, Piscataway, NJ. †Present address: The Prediction Co., Santa Fe, NM. ‡Present address: Albert-Ludwigs-Universität, Germany. §Present address: University of Connecticut, Storrs, CT. **Present address: LIGO/Caltech, Pasadena, CA. ††Present address: Universitätspital, Zürich, Switzerland.
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