Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physical Review D Year : 2010

Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data

E. Abouzaid
  • Function : Author
M. Arenton
  • Function : Author
A.R. Barker
  • Function : Author
L. Bellantoni
  • Function : Author
E. Blucher
  • Function : Author
G. J. Bock
  • Function : Author
E. Cheu
  • Function : Author
R. Coleman
  • Function : Author
M.D. Corcoran
  • Function : Author
B. Cox
  • Function : Author
A.R. Erwin
  • Function : Author
C.O. Escobar
  • Function : Author
A. Glazov
  • Function : Author
R.A. Gomes
  • Function : Author
P. Gouffon
  • Function : Author
Y. B. Hsiung
  • Function : Author
D.A. Jensen
  • Function : Author
R. Kessler
  • Function : Author
K. Kotera
  • Function : Author
A. Ledovskoy
  • Function : Author
P. L. Mcbride
  • Function : Author
E. Monnier
H. Nguyen
R. Niclasen
  • Function : Author
D.G. Phillips
  • Function : Author
E.J. Ramberg
  • Function : Author
R.E. Ray
  • Function : Author
M. Ronquest
  • Function : Author
E. Santos
  • Function : Author
W. Slater
  • Function : Author
D. Smith
  • Function : Author
N. Solomey
  • Function : Author
E. C. Swallow
  • Function : Author
P. A. Toale
  • Function : Author
R. Tschirhart
  • Function : Author
Y. W. Wah
  • Function : Author
J. Wang
  • Function : Author
H. B. White
  • Function : Author
J. Whitmore
  • Function : Author
M. J. Wilking
  • Function : Author
R. Winston
  • Function : Author
E.T. Worcester
  • Function : Author
T. Yamanaka
  • Function : Author
E. D. Zimmerman
  • Function : Author
R.F. Zukanovich
  • Function : Author

Abstract

Using the published KTeV samples of K_L --> pi^{\pm} e^{\mp} nu and K_L --> pi^{\pm} mu^{\mp} nu decays [1], we perform a reanalysis of the scalar and vector form factors based on the dispersive parameterization [2,3]. We obtain phase space integrals I^e_K = 0.15446 \pm 0.00025 and I^{mu}_K = 0.10219 \pm 0.00025. For the scalar form factor parameterization, the only free parameter is the normalized form factor value at the Callan-Treiman point (C); our best fit results in ln C = 0.1915 \pm 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).

Dates and versions

in2p3-00454551 , version 1 (09-02-2010)

Identifiers

Cite

V. Bernard, M. Oertel, E. Passemar, J. Stern, E. Abouzaid, et al.. Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data. Physical Review D, 2010, 81, pp.052001. ⟨10.1103/PhysRevD.81.052001⟩. ⟨in2p3-00454551⟩
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