Improved KL→π±e ν form factor and phase space integral with reduced model uncertainty

E. Abouzaid, M. Arenton, A. R. Barker, L. Bellantoni, A. Bellavance, E. Blucher, G. J. Bock, E. Cheu, R. Coleman, M. D. Corcoran, B. Cox, A. R. Erwin, A. Glazov, A. Golossanov, Y. B. Hsiung, H. Huang, D. A. Jensen, R. Kessler, H. G.E. Kobrak, K. KoteraA. Ledovskoy, P. L. McBride, E. Monnier, H. Nguyen, R. Niclasen, E. J. Ramberg, R. E. Ray, M. Ronquest, 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

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Using the published KTeV sample of 2×106 KL→π±e ν decays and a new form factor expansion with a rigorous bound on higher order terms, we present a new determination of the KL→π±e ν form factor and phase space integral. Compared to the previous KTeV result, the uncertainty in the new form factor expansion is negligible and results in an overall uncertainty in the phase space integral (IKe) that is a factor of 2 smaller: IKe=0.15392±0.00048.

Original languageEnglish (US)
Article number097101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number9
DOIs
StatePublished - Nov 24 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Abouzaid, E., Arenton, M., Barker, A. R., Bellantoni, L., Bellavance, A., Blucher, E., Bock, G. J., Cheu, E., Coleman, R., Corcoran, M. D., Cox, B., Erwin, A. R., Glazov, A., Golossanov, A., Hsiung, Y. B., Huang, H., Jensen, D. A., Kessler, R., Kobrak, H. G. E., ... Zimmerman, E. D. (2006). Improved KL→π±e ν form factor and phase space integral with reduced model uncertainty. Physical Review D - Particles, Fields, Gravitation and Cosmology, 74(9), [097101]. https://doi.org/10.1103/PhysRevD.74.097101