A Determination of the Cabibbo-Kobayashi-Maskawa Parameter |V_us|_ Using K_L Decays

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T. Alexopoulos¹¹, M. Arenton¹⁰, R. F. Barbosa^7,*, A. R. Barker^5,†, L. Bellantoni⁷, A. Bellavance⁹, E. Blucher⁴, G. J. Bock⁷, E. Cheu¹, S. Childress⁷, R. Coleman⁷, M. D. Corcoran⁹, B. Cox¹⁰, A. R. Erwin¹¹, R. Ford⁷, A. Glazov⁴, A. Golossanov¹⁰, J. Graham⁴, J. Hamm¹, K. Hanagaki⁸, Y. B. Hsiung⁷, H. Huang⁵, V. Jejer¹⁰, D. A. Jensen⁷, R. Kessler⁴, H. G. E. Kobrak³, K. Kotera⁸, J. LaDue⁵, A. Ledovskoy¹⁰, P. L. McBride⁷, E. Monnier^4,‡, K. S. Nelson¹⁰, H. Nguyen⁷, R. Niclasen⁵, V. Prasad⁴, X. R. Qi⁷, E. J. Ramberg⁷, R. E. Ray⁷, M. Ronquest¹⁰, E. Santos^7,§, P. Shanahan⁷, J. Shields¹⁰, W. Slater², D. Smith¹⁰, N. Solomey⁴, E. C. Swallow^4,6, P. A. Toale⁵, R. Tschirhart⁷, Y. W. Wah⁴, J. Wang¹, H. B. White⁷, J. Whitmore⁷, M. Wilking⁵, B. Winstein⁴, R. Winston⁴, E. T. Worcester⁴, T. Yamanaka⁸, and E. D. Zimmerman⁵ (KTeV Collaboration)
¹University of Arizona, Tucson, Arizona 85721, USA
²University of California at Los Angeles, Los Angeles, California 90095, USA
³University of California at San Diego, La Jolla, California 92093, USA
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
¹⁰The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901, USA
¹¹University of Wisconsin, Madison, Wisconsin 53706, USA

^*Permanent address: University of São Paulo, São Paulo, Brazil.

^†Deceased.

^‡Permanent address: C.P.P. Marseille/C.N.R.S., France.

^§Permanent address: University of São Paulo, São Paulo, Brazil.