Phys. Rev. D
76,
052001
(2007)
[7 pages]
Measurement of the decay KL→π0e+e-γ
E. Abouzaid et al. KTeV Collaboration
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E. Abouzaid4, M. Arenton11, A. R. Barker5,*, L. Bellantoni7, E. Blucher4, G. J. Bock7, E. Cheu1,†, R. Coleman7, B. Cox11, A. R. Erwin12, C. O. Escobar3, A. Glazov4, A. Golossanov11, R. A. Gomes3, P. Gouffon10, Y. B. Hsiung7, D. A. Jensen7, R. Kessler4, Y. J. Kim1, K. Kotera8, A. Ledovskoy11, P. L. McBride7, E. Monnier4,‡, K. S. Nelson11, H. Nguyen7, R. Niclasen5, D. G. Phillips, II11, H. Ping12, E. J. Ramberg7, R. E. Ray7, M. Ronquest11, E. Santos10, W. Slater2, D. Smith11, N. Solomey4, E. C. Swallow4,6, P. A. Toale5, R. Tschirhart7, C. Velissaris12, Y. W. Wah4, J. Wang1, H. B. White7, J. Whitmore7, M. J. Wilking5, R. Winston4, E. T. Worcester4, M. Worcester4, T. Yamanaka8, E. D. Zimmerman5, and R. F. Zukanovich10 (KTeV Collaboration)
1University of Arizona, Tucson, Arizona 85721, USA 2University of California at Los Angeles, Los Angeles, California 90095, USA 3Universidade Estadual de Campinas, Campinas, Brazil 13083-970 4The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA 5University of Colorado, Boulder, Colorado 80309, USA 6Elmhurst College, Elmhurst, Illinois 60126, USA 7Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA 8Osaka University, Toyonaka, Osaka 560-0043 Japan 9Rice University, Houston, Texas 77005, USA 10Universidade de São Paulo, São Paulo, Brazil 05315-970 11The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901, USA 12University of Wisconsin, Madison, Wisconsin 53706, USA
Received 27 June 2007; published 12 September 2007
We report on a new measurement of the branching ratio B(KL→π0e+e-γ) using the KTeV detector. This analysis uses the full KTeV data set collected from 1997 to 2000. We reconstruct 139 events over a background of 14, which results in B(KL→π0e+e-γ)=(1.62±0.14stat±0.09syst)×10-8. This result supersedes the earlier KTeV measurement of this branching ratio.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.76.052001
DOI:
10.1103/PhysRevD.76.052001
PACS:
13.20.Eb, 11.30.Er, 12.39.Fe, 13.40.Gp
*Deceased. †To whom correspondence should be addressed. elliott@physics.arizona.edu ‡Permanent address: C.P.P. Marseille/C.N.R.S., France.
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