Phys. Rev. Lett.
88,
181601
(2002)
[5 pages]
Measurement of the KL Charge Asymmetry
A. Alavi-Harati et al. (KTeV Collaboration)
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A. Alavi-Harati12, T. Alexopoulos12, M. Arenton11, K. Arisaka2, S. Averitte10, R. F. Barbosa7,*, A. R. Barker5, M. Barrio4, 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, A. Glazov4, A. Golossanov11, G. Graham4, J. Graham4, K. Hagan11, E. Halkiadakis10, J. Hamm1, K. Hanagaki8, S. Hidaka8, Y. B. Hsiung7, V. Jejer11, D. A. Jensen7, R. Kessler4, H. G. E. Kobrak3, J. LaDue5, A. Lath10, A. Ledovskoy11, P. L. McBride7, P. Mikelsons5, E. Monnier4,†, T. Nakaya7, K. S. Nelson11, H. Nguyen7,‡, V. O'Dell7, M. Pang7, R. Pordes7, V. Prasad4, X. R. Qi7, B. Quinn4, E. J. Ramberg7, R. E. Ray7, A. Roodman4, M. Sadamoto8, S. Schnetzer10, K. Senyo8, P. Shanahan7, P. S. Shawhan4, J. Shields11, W. Slater2, N. Solomey4, S. V. Somalwar10, R. L. Stone10, E. C. Swallow4,6, S. A. Taegar1, R. J. Tesarek10, G. B. Thomson10, P. A. Toale5, A. Tripathi2, R. Tschirhart7, S. E. Turner2, 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 560-0043, Japan
9Rice University, Houston, Texas 77005
10Rutgers University, Piscataway, New Jersey 08854
11The Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901
12University of Wisconsin, Madison, Wisconsin 53706
Received 31 December 2001; published 22 April 2002
We present a measurement of the charge asymmetry δL in the mode KL→π±e∓ν based on 298×106 analyzed decays. We measure a value of δL = [3322±58(stat)±47(syst)]×10-6, in good agreement with previous measurements and 2.4 times more precise than the current best published result. The result is used to place more stringent limits on CPT and ΔS = ΔQ violation in the neutral kaon system.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.181601
DOI:
10.1103/PhysRevLett.88.181601
*Permanent address: University of São Paulo, São Paulo, Brazil. †Permanent address: C.P.P. Marseille/CNRS, France. ‡To whom correspondence should be addressed. Email address: hogann@fnal.gov
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