TY  - JOUR
AU  - KTeV Collaboration (Abouzaid, E. et al
AU  - Passemar, E.
PY  - 2010
DA  - 2010//
TI  - Dispersive analysis of KLmu3 and KLe3 scalar and vector form factors using KTeV data
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 052001
EP  - 9pp
VL  - 81
IS  - 5
PB  - Amer Physical Soc
AB  - 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).
SN  - 1550-7998
UR  - http://arxiv.org/abs/0912.1291
UR  - https://doi.org/10.1103/PhysRevD.81.052001
DO  - 10.1103/PhysRevD.81.052001
LA  - English
N1  - ISI:000276194200009
ID  - KTeVCollaborationAbouzaid+Passemar2010
ER  -