Phys. Rev. Lett. 86, 397 - 401 (2001)
Search for the Decay KL → π0e+e-
A. Alavi-Harati et al. (KTeV Collaboration)
Show All Authors/Affiliations
Hide Authors/Affiliations
A. Alavi-Harati12, I. F. Albuquerque10, T. Alexopoulos12, M. Arenton11, K. Arisaka2, S. Averitte10, A. R. Barker5, L. Bellantoni7, A. Bellavance9, J. Belz10, R. Ben-David7, D. R. Bergman10, E. Blucher4, G. J. Bock7, C. Bown4, S. Bright4, E. Cheu1, S. Childress7, R. Coleman7, M. D. Corcoran9, G. Corti11, B. Cox11, M. B. Crisler7, A. R. Erwin12, R. Ford7, P. M. Fordyce5, A. Glazov4, A. Golossanov11, G. Graham4, J. Graham4, K. Hagan11, E. Halkiadakis10, K. Hanagaki8, S. Hidaka8, Y. B. Hsiung7, V. Jejer11, J. Jennings2, D. A. Jensen7, R. Kessler4, H. G. E. Kobrak3, J. LaDue5, A. Lath10, A. Ledovskoy11, P. L. McBride7, A. P. McManus11, P. Mikelsons5, E. Monnier4, T. Nakaya7, K. S. Nelson11, H. Nguyen7, V. O'Dell7, M. Pang7, R. Pordes7, V. Prasad4, C. Qiao4, B. Quinn4, E. J. Ramberg7, R. E. Ray7, A. Roodman4, M. Sadamoto8, S. Schnetzer10, K. Senyo8, P. Shanahan7, P. S. Shawhan4, W. Slater2, N. Solomey4, S. V. Somalwar10, R. L. Stone10, I. Suzuki8, E. C. Swallow4,6, R. A. Swanson3, S. A. Taegar1, R. J. Tesarek10, G. B. Thomson10, P. A. Toale5, A. Tripathi2, R. Tschirhart7, Y. W. Wah4, J. Wang1, H. B. White7, J. Whitmore7, B. Winstein4, R. Winston4, T. Yamanaka8, and E. D. Zimmerman4 (KTeV Collaboration)
1University of Arizona, Tucson, Arizona 85721
2University of California at Los Angeles, Los Angeles, California 90095
3University of California at San Diego, La Jolla, California 92093
4The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637
5University of Colorado, Boulder, Colorado 80309
6Elmhurst College, Elmhurst, Illinois 60126
7Fermi National Accelerator Laboratory, Batavia, Illinois 60510
8Osaka University, Toyonaka, Osaka 560, Japan
9Rice University, Houston, Texas 77005
10Rutgers University, Piscataway, New Jersey 08855
11The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901
12University of Wisconsin, Madison, Wisconsin 53706
Received 11 September 2000
We report on a search for the decay KL→π0e+e- carried out by the KTeV/E799 experiment at Fermilab. This decay is expected to have a significant CP violating contribution and the measurement of its branching ratio could support the Cabibbo-Kobayashi-Maskawa mechanism for CP violation or could point to new physics. Two events were observed in the 1997 data with an expected background of 1.06±0.41 events, and we set an upper limit B(KL→π0e+e-)<5.1×10-10 at the 90% confidence level.
©2001 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v86/p397
DOI: 10.1103/PhysRevLett.86.397
PACS: 13.20.Eb, 11.30.Er, 14.40.Aq
[
Abstract
|
Previous article
| Next article
|
Issue 3
]
|
|
