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Type: Artigo de periódico
Title: Dispersive Analysis Of Klμ3 And Kle3 Scalar And Vector Form Factors Using Ktev Data
Author: 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 P.
Hsiung Y.B.
Jensen D.A.
Kessler R.
Kotera K.
Ledovskoy A.
McBride P.L.
Monnier E.
Nguyen H.
Niclasen R.
Phillips D.G.
Ramberg E.J.
Ray R.E.
Ronquest M.
Santos E.
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.
Zukanovich R.F.
Bernard V.
Oertel M.
Passemar E.
Stern J.
Abstract: Using the published KTeV samples of KL→π±e "ν and KL→π±μ "ν decays, we perform a reanalysis of the scalar and vector form factors based on the dispersive parametrization. We obtain phase-space integrals IKe=0.15446±0.00025 and IKμ=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 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 FK/Fπ and f+(0). © 2010 The American Physical Society.
Citation: Physical Review D - Particles, Fields, Gravitation And Cosmology. , v. 81, n. 5, p. - , 2010.
Rights: aberto
Identifier DOI: 10.1103/PhysRevD.81.052001
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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