Improved KLπ±eν form factor and phase space integral with reduced model uncertainty

E. Abouzaid et al. (The KTeV Collaboration)
Phys. Rev. D 74, 097101 – Published 20 November 2006

Abstract

Using the published KTeV sample of 2×106 KLπ±eν decays [1] and a new form factor expansion with a rigorous bound on higher order terms [2], we present a new determination of the KLπ±eν form factor and phase space integral. Compared to the previous KTeV result [1], 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.

  • Figure
  • Figure
  • Received 27 August 2006

DOI:https://doi.org/10.1103/PhysRevD.74.097101

©2006 American Physical Society

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Vol. 74, Iss. 9 — 1 November 2006

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