Artículos de revistas
Dispersive analysis of KL mu 3 and KLe3 scalar and vector form factors using KTeV data
Fecha
2010Registro en:
PHYSICAL REVIEW D, v.81, n.5, 2010
1550-7998
10.1103/PhysRevD.81.052001
Autor
ABOUZAID, E.
ARENTON, M.
BARKER, A. R.
BELLANTONI, L.
BLUCHER, E.
BOCK, G. J.
CHEU, E.
COLEMAN, R.
CORCORAN, M. D.
COX, B.
ERWIN, A. R.
ESCOBAR, C. O.
GLAZOV, A.
GOMES, R. A.
Gouffon, Philippe
HSIUNG, Y. B.
JENSEN, D. A.
KESSLER, R.
KOTERA, K.
LEDOVSKOY, A.
MCBRIDE, P. L.
MONNIER, E.
NGUYEN, H.
NICLASEN, R.
II, D. G. Phillips
RAMBERG, E. J.
RAY, R. E.
RONQUEST, M.
Paes, Eliel dos Santos
SLATER, W.
SMITH, D.
SOLOMEY, N.
SWALLOW, E. C.
TOALE, P. A.
TSCHIRHART, R.
WAH, Y. W.
WANG, J.
WHITE, H. B.
WHITMORE, J.
WILKING, M. J.
WINSTON, R.
WORCESTER, E. T.
YAMANAKA, T.
ZIMMERMAN, E. D.
Funchal, Renata Zukanovich
BERNARD, Veronique
OERTEL, Micaela
PASSEMAR, Emilie
STERN, Jan
Institución
Resumen
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).