M ay 2 00 8 Final Results from the KTeV Experiment on the Decay K L → π 0 γγ

E. Abouzaid, M. Arenton, A.R. Barker, ∗ L. Bellantoni, E. Blucher, G.J. Bock, E. Cheu, R. Coleman, M.D. Corcoran, B. Cox, A.R. Erwin, C.O. Escobar, A. Glazov, A. Golossanov, R.A. Gomes, P. Gouffon, Y.B. Hsiung, D.A. Jensen, R. Kessler, K. Kotera, A. Ledovskoy, P.L. McBride, E. Monnier, † H. Nguyen, R. Niclasen, D.G. Phillips II, E.J. Ramberg, R.E. Ray, M. Ronquest, E. Santos, W. Slater, D. Smith, N. Solomey, E.C. Swallow, 6 P.A. Toale, R. Tschirhart, Y.W. Wah, J. Wang, H.B. White, J. Whitmore, M. J. Wilking, B. Winstein, R. Winston, E.T. Worcester, T. Yamanaka, E. D. Zimmerman, and R.F. Zukanovich University of Arizona, Tucson, Arizona 85721 University of California at Los Angeles, Los Angeles, California 90095 Universidade Estadual de Campinas, Campinas, Brazil 13083-970 The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 University of Colorado, Boulder, Colorado 80309 Elmhurst College, Elmhurst, Illinois 60126 Fermi National Accelerator Laboratory, Batavia, Illinois 60510 Osaka University, Toyonaka, Osaka 560-0043 Japan Rice University, Houston, Texas 77005 Universidade de São Paulo, São Paulo, Brazil 05315-970 The Department of Physics and Institute of Nuclear and Particle