A determination of the cabibbo-kobayashi-maskawa parameter |VUS| using KL decays

T. Alexopoulos, M. Arenton, R. F. Barbosa, A. R. Barker, L. Bellantoni, A. Bellavance, E. Blucher, G. J. Bock, E. Cheu, S. Childress, R. Coleman, M. D. Corcoran, B. Cox, A. R. Erwin, R. Ford, A. Glazov, A. Golossanov, J. Graham, J. Hamm, K. HanagakiY. B. Hsiung, H. Huang, V. Jejer, D. A. Jensen, R. Kessler, H. G.E. Kobrak, K. Kotera, J. LaDue, A. Ledovskoy, P. L. McBride, E. Monnier, K. S. Nelson, H. Nguyen, R. Niclasen, V. Prasad, X. R. Qi, E. J. Ramberg, R. E. Ray, M. Ronquest, E. Santos, P. Shanahan, J. Shields, W. Slater, D. Smith, N. Solomey, E. C. Swallow, P. A. Toale, R. Tschirhart, Y. W. Wah, J. Wang, H. B. White, J. Whitmore, M. Wilking, B. Winstein, R. Winston, E. T. Worcester, T. Yamanaka, E. D. Zimmerman

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Abstract

The KTev experiment was performed at Fermilab to determine the Cabibbo-Kobayashi-Maskawa parameter |Vus| based on new measurements of the six largest KL branching fractions and semileptonic forms factors. The |Vus| was found to be equivalent to 0.2252±0. 0008KTeV±0.0021ext , where the errors were from KTeV measurements and from external sources. The CP violation parameter |η+-|=(2.228±0.005fKTeV±0.009 ext) ×10-3 was determined using the measured branching fractions. The results indicate that the improved form factor measurements may help to reduce theoretical uncertainties in f+(0).

Original languageEnglish (US)
Article number181802
Pages (from-to)181802-1-181802-4
JournalPhysical review letters
Volume93
Issue number18
DOIs
StatePublished - Oct 29 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Alexopoulos, T., Arenton, M., Barbosa, R. F., Barker, A. R., Bellantoni, L., Bellavance, A., Blucher, E., Bock, G. J., Cheu, E., Childress, S., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Ford, R., Glazov, A., Golossanov, A., Graham, J., Hamm, J., ... Zimmerman, E. D. (2004). A determination of the cabibbo-kobayashi-maskawa parameter |VUS| using KL decays. Physical review letters, 93(18), 181802-1-181802-4. [181802]. https://doi.org/10.1103/PhysRevLett.93.181802