Search for the rare decay KL → π0e +e-

A. Alavi-Harati, T. Alexopoulos, M. Arenton, R. F. Barbosa, A. R. Barker, M. Barrio, L. Bellantoni, A. Bellavance, E. Blucher, G. J. Bock, C. Bown, S. Bright, E. Cheu, R. Coleman, M. D. Corcoran, B. Cox, A. R. Erwin, C. O. Escobar, R. Ford, A. GlazovA. Golossanov, R. A. Gomes, P. Gouffon, J. Graham, J. Hamm, K. Hanagaki, Y. B. Hsiung, H. Huang, V. Jejer, D. A. Jensen, R. Kessler, H. G.E. Kobrak, K. Kotera, J. Ladue, N. Lai, A. Ledovskoy, P. L. McBride, E. Monnier, K. S. Nelson, H. Nguyen, H. Ping, V. Prasad, X. R. Qi, B. Quinn, E. J. Ramberg, R. E. Ray, M. Ronquest, E. Santos, K. Senyo, P. Shanahan, J. Shields, W. Slater, D. E. Smith, N. Solomey, E. C. Swallow, S. A. Taegar, R. J. Tbsarek, P. A. Toale, R. Tschirhart, C. Velissaris, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. Wilking, B. Winstein, R. Winston, E. T. Worcester, T. Yamanaka, R. F. Zukanovich

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108 Scopus citations


A rare kaon decay KL→π0e+e - that was searched at the Fermilab was discussed. It was observed that the measurements of its branching ratio could support the standard model or indicate the existence of new physics. Two parallel KL beams was created that entered a 65 m long vacuum tank that defined the fiducial volume for accepted delays. To study detector geometry and performance, a detailed package of Monte Carlo simulation routines was used.

Original languageEnglish (US)
Article number021805
Pages (from-to)021805-1-021805-4
JournalPhysical review letters
Issue number2
StatePublished - Jul 9 2004
Externally publishedYes

Bibliographical note

Funding Information:
We gratefully acknowledge the support and effort of the Fermilab staff and the technical staffs of the participating institutions for their vital contributions. This work was supported in part by the U.S. Department of Energy, The National Science Foundation, and The Ministry of Education and Science of Japan. In addition, A. R. B. and E. B. acknowledge support from the NYI program of the NSF; A. R. B. and E. B. from the Alfred P. Sloan Foundation; E. B. from the OJI program of the DOE; K. H. from the Japan Society for the Promotion of Science; and R. F. B. from the Fundação de Amparo à Pesquisa do Estado de São Paolo.


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