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 journalArticlepeer-review


    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. © 2006 The American Physical Society.
    Original languageEnglish
    Article number097101
    JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
    Issue number9
    Publication statusPublished - 2006


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