Measurement of the slope parameter αfor the η→ 3π⁰ decay at KLOE

2007/07/27 by KLOE collaboration, F. Ambrosino, KLOE Collaboration +165
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.48550/arxiv.0707.4137

" Contributed paper to Lepton-Photon 2007 ". 5 pages, 4 figures

arxiv created 2007/07/27 · openalex publication_date 2007/07/27 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

We report a preliminary measurement of the slope parameter α for the η→ 3\piz decay carried out with KLOE at DAΦNE; where α is the parameter describing the energy dependence of the square of the matrix element for this decay. By fitting the event density in the Dalitz plot with a collected statistic of 420 pb^-1 we determine α= -0.027 ± 0.004 (stat) ^+0.004_-0.006 (syst). This result is consistent with current chiral perturbation theory calculations within the unitary approach.

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• Measurement of Γ(η→ π⁺π^-γ)/Γ(η→ π⁺π^-π⁰) with KLOE experiment