Dispersive analysis of K{sub L{mu}3} and K{sub Le3} scalar and vector form factors using KTeV data

Journal Article · Mon Mar 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.052001· OSTI ID:21409813

Abouzaid, E; Blucher, E; Glazov, A; Kessler, R; Monnier, E; Solomey, N; Wah, Y W; Winston, R; Worcester, E T ^[1]; Arenton, M; Cox, B; Ledovskoy, A; Phillips, II, D G; Ronquest, M; Smith, D ^[2]; Barker, A R; Niclasen, R; Toale, P A; Wilking, M J; Zimmerman, E D ^[3]

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1. The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637 (United States)
2. Department of Physics and Institute of Nuclear and Particle Physics, University of Virginia, Charlottesville, Virginia 22901 (United States)
3. University of Colorado, Boulder, Colorado 80309 (United States)

Using the published KTeV samples of K{sub L{yields}{pi}}{sup {+-}e{+-}{nu}}and K{sub L{yields}{pi}}{sup {+-}{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{sub K}{sup e}=0.154 46{+-}0.000 25 and I{sub K}{sup {mu}=}0.102 19{+-}0.000 25. 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 lnC=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{sub K}/F{sub {pi}}and f{sub +}(0).

• OSTI ID: 21409813
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 5; Other Information: DOI: 10.1103/PhysRevD.81.052001; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPARATIVE EVALUATIONS
ELECTRONS
FORM FACTORS
LATTICE FIELD THEORY
MUONS MINUS
MUONS PLUS
NEUTRINOS
PARTICLE DECAY
PHASE SPACE
PIONS MINUS
PIONS PLUS
POSITRONS
QUANTUM CHROMODYNAMICS
SENSITIVITY
STANDARD MODEL
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
CONSTRUCTIVE FIELD THEORY
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
EVALUATION
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
LEPTONS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATHEMATICAL SPACE
MATTER
MESONS
MUONS
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
SPACE
UNIFIED GAUGE MODELS