6533b7d9fe1ef96bd126cabf

RESEARCH PRODUCT

Dispersive analysis ofKLμ3andKLe3scalar and vector form factors using KTeV data

E. AbouzaidMicaela OertelW. E. SlaterM. D. CorcoranA. R. ErwinE. M. SantosR. E. RayCarlos EscobarN. SolomeyAlexandre GlazovEmilie PassemarEmilie PassemarT. YamanakaR. ColemanR. F. ZukanovichK. KoteraJan SternJ. WangE. J. RambergY. B. HsiungE. D. ZimmermanY. W. WahE. BlucherE. C. SwallowE. C. SwallowH. NguyenBradley CoxD. A. JensenR. TschirhartE. MonnierE. MonnierRichard KesslerM. RonquestPatricia McbrideJ. WhitmoreE. T. WorcesterVéronique BernardA. R. BarkerR. A. GomesD. G. PhillipsP. A. ToaleG. J. BockR. NiclasenAlexander LedovskoyH. B. WhiteL. BellantoniP. GouffonElliott CheuM. J. WilkingMichael Wayne ArentonD. SmithRoland Winston

subject

PhysicsNuclear and High Energy PhysicsAntiparticleParticle physicsMuonMeson010308 nuclear & particles physicsHadronScalar (mathematics)Elementary particle01 natural sciencesParticle decay0103 physical sciencesAtomic physics010306 general physicsDimensionless quantity

description

Using the published KTeV samples of K{sub L} {yields} {pi}{sup {+-}}e{sup {-+}}{nu} and K{sub L} {yields} {pi}{sup {+-}}{mu}{sup {-+}}{nu} decays, we perform a reanalysis of the scalar and vector form factors based on the dispersive parameterization. We obtain phase space integrals I{sub K}{sup e} = 0.15446 {+-} 0.00025 and I{sub K}{sup {mu}} = 0.10219 {+-} 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 {+-} 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).

yearjournalcountryeditionlanguage
2010-03-04Physical Review D
https://doi.org/10.1103/physrevd.81.052001