Detailed Study of the KL -> 3pi0 Dalitz Plot

Abstract

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.

accepted by Phys. Rev D

References in corpus (11)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• ππscattering
• Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System
• The pi pi S-wave scattering lengths
• High statistics measurement of Ke4 decay properties
• First measurement of the ${\pi }^{+}{\pi }^{-}$ atom lifetime
• Pion-pion scattering and the K->3pi decay amplitudes
• Observation of a cusp-like structure in the pizero-pizero invariant mass distribution from K+- ==> pi+- pizero pizero decay and determination of the pi-pi scattering lengths
• Measurements of KL Branching Fractions and the CP Violation Parameter |eta+-|
• Measurement of the quadratic slope parameter in the K_L -> 3π^0 decay Dalitz plot

Cited by in corpus (17)

• Kaon Decays in the Standard Model
• Precise Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System
• Electromagnetic corrections in eta --> 3 pi decays
• Radiative corrections in K --> 3 pi decays
• Analytical dispersive construction of $\eta \to 3\pi$ amplitude: First order in isospin breaking
• Isospin breaking in Kl4 decays
• Experiments with K-Meson Decays
• The cusp effect in eta' --> eta pi pi decays
• Measurement of the eta->3pi0 Dalitz Plot Distribution with the WASA Detector at COSY
• Predictions for the cusp in eta->3pi0 decay
• Hadronic Atoms
• Dispersive construction of two-loop $P\to \pi \pi \pi$ $(P=K,\eta )$ amplitudes
• Dispersive representation of K -> 3 pi amplitudes and cusps
• Measurement of the decay ${\eta }^{\prime }\to {\pi }^0{\pi }^0\eta$ at MAMI
• Evidence for the Cusp Effect in ${\eta }^{\prime }$ Decays into $\eta {\pi }^0{\pi }^0$
• A holographic approach to low-energy weak interactions of hadrons
• Sweeping the pion chimney for axion-like particles with KOTO