%0 Journal Article
%T Dispersive analysis of KLmu3 and KLe3 scalar and vector form factors using KTeV data
%A KTeV Collaboration (Abouzaid, E. et al
%A Passemar, E.
%J Physical Review D
%D 2010
%V 81
%N 5
%I Amer Physical Soc
%@ 1550-7998
%G English
%F KTeVCollaborationAbouzaid+Passemar2010
%O ISI:000276194200009
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=253), last updated on Wed, 16 Feb 2011 22:22:24 +0000
%X Using the published KTeV samples of K-L -> pi(+/-)e(-/+)nu and K-L -> pi(+/-)mu(-/+)nu decays, we perform a reanalysis of the scalar and vector form factors based on the dispersive parametrization. We obtain phase-space integrals I-K(e) = 0.15446 +/- 0.00025 and I-K(mu) = 0.10219 +/- 0.00025. For the scalar form factor parametrization, the only free parameter is the normalized form factor value at the Callan-Treiman point (C); our best-fit results in InC = 0.1915 +/- 0.0122. We also study the sensitivity of C to different parametrizations of the vector form factor. The results for the phase-space integrals and C are then used to make tests of the standard model. Finally, we compare our results with lattice QCD calculations of F-K/F-pi and f(+)(0).
%R 10.1103/PhysRevD.81.052001
%U http://arxiv.org/abs/0912.1291
%U https://doi.org/10.1103/PhysRevD.81.052001
%P 052001-9pp