High statistics measurement of Ke4 decay properties

Abstract

We report experimental details and results of a new measurement of the decay K+ -> pi+pi-e+nue (Ke4}. A sample of more than 400,000 Ke4 events with low background has been collected by Experiment 865 at the Brookhaven Alternate Gradient Synchrotron. From these data, the branching ratio (4.11+-0.01+-0.11)*10**(-5) and the pi-pi invariant mass dependence of the form factors F, G, and H of the weak hadronic current as well as the phase shift difference delta00-delta11 for pi-pi-scattering were extracted. Using constraints based on analyticity and chiral symmetry, a new value with considerably improved accuracy for the s-wave pi-pi-scattering length a00 has been obtained also: a00=0.216+-0.013 (stat.)+-0.002(syst.)+-0.002(theor.).

15 pages, 10 figures, submitted to Phys. Rev. D

References in corpus (15)

• ππscattering
• Roy equation analysis of pi pi scattering
• Elastic $\pi \pi$ scattering to two loops
• The Low Energy $\pi \pi$ Amplitude to One and Two Loops
• QCD Isospin Breaking in Meson Masses, Decay Constants and Quark Mass Ratios
• A new measurement of K+(e4) decay and the s-wave pi-pi-scattering length a00
• The pi pi S-wave scattering lengths
• The quark condensate from K_{e_4} decays
• Analysis and interpretation of new low-energy Pi-Pi scattering data
• $K_{\ell 4}$ Form-Factors and $\pi$-$\pi$ Scattering
• Determination of Two-Loop $\pi \pi$ Scattering Amplitude Parameters
• Low Energy Constants from Kl4 Form-Factors
• Semileptonic $\pi$ and $K$ Decays and the Chiral Anomaly at One-loop
• A Parametrization for $K^{+}\to {\pi }^{+}{\pi }^{-}{e}^{+}\nu$
• A New Measurement of the Radiative Ke3 Branching Ratio and Photon Spectrum

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