A new measurement of K+(e4) decay and the s-wave pi-pi-scattering length a00

Details A new measurement of K+(e4) decay and the s-wave pi-pi-scattering length a00 A new measurement of K+(e4) decay and the s-wave pi-pi-scattering length a00

2001-06-19

arxiv.org/abs/hep-ex/0106071v1

Phys.Rev.Lett.87:221801,2001

Physics

High Energy Physics

High Energy Physics - Experiment

Scientific paper

10.1103/PhysRevLett.87.221801

A sample of 400000 events from the decay K+->pi+pi-e+nu(e)(K(e4)) has been collected in experiment E865 at the Brookhaven AGS. The analysis of these data yields new measurements of the K(e4) branching ratio (4.11+-0.01+-0.11)*10**(-5)), the s-wave pi-pi scattering length a00=0.228+-0.012+-0.003, and the form factors F, G, and H of the hadronic current and their dependence on the invariant pi-pi mass.

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