Detailed Study of the KL -> 3pi0 Dalitz Plot

Details Detailed Study of the KL -> 3pi0 Dalitz Plot Detailed Study of the KL -> 3pi0 Dalitz Plot

2008-06-21

arxiv.org/abs/0806.3535v2

Phys.Rev.D78:032009,2008

Physics

High Energy Physics

High Energy Physics - Experiment

accepted by Phys. Rev D

Scientific paper

10.1103/PhysRevD.78.032009

Using a sample of 68 million KL -> 3pi0 decays collected in 1996-1999 by the KTeV (E832) experiment at Fermilab, we present a detailed study of the KL -> 3pi0 Dalitz plot density. We report the first observation of interference from KL->pi+pi-pi0 decays in which pi+pi- rescatters to 2pi0 in a final-state interaction. This rescattering effect is described by the Cabibbo-Isidori model, and it depends on the difference in pion scattering lengths between the isospin I=0 and I=2 states, a0-a2. Using the Cabibbo-Isidori model, we present the first measurement of the KL-> 3pi0 quadratic slope parameter that accounts for the rescattering effect.

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