Measurement of the Slope Parameter for the eta->3pi0 Decay in the pp->pp eta Reaction

Abstract

The CELSIUS/WASA setup is used to measure the 3pi0 decay of eta mesons produced in pp interactions with beam kinetic energies of 1.36 and 1.45 GeV. The efficiency-corrected Dalitz plot and density distributions for this decay are shown, together with a fit of the quadratic slope parameter alpha yielding alpha = -0.026 +/- 0.010(stat) +/- 0.010(syst). This value is compared to recent experimental results and theoretical predictions.

arXiv comment4 pages, 7 Postscript figures, uses revtex4.sty

References in corpus (12)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The ratios of the light quark masses
• Dispersive analysis of the decay eta -> 3 pi
• Final State Interactions and Khuri-Treiman Equations in $\eta \to 3\pi$ decays
• Determination of the a0-a2 pion scattering length from K->pi+ pi0 pi0 decay
• Hadronic eta and eta-prime decays
• Electromagnetic Corrections to the decays $\eta \to 3\pi$
• Eta decays at and beyond ${\mathbf{p}}^4$ in Chiral Perturbation Theory
• Hadronic decays of eta and eta-prime with coupled channels
• Light quark mass ratio from Dalitz plot of $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ decay
• The pp -> pp pi pi pi reaction channels in the threshold region

Cited by in corpus (24)

• QCD and strongly coupled gauge theories: challenges and perspectives
• Physics with the KLOE-2 experiment at the upgraded DA$\varphi$NE
• $\eta \to 3\pi$ at Two Loops In Chiral Perturbation Theory
• The WASA Detector Facility at CELSIUS
• Electromagnetic corrections in eta --> 3 pi decays
• Analytical dispersive construction of $\eta \to 3\pi$ amplitude: First order in isospin breaking
• Three-body Final State Interaction in $\eta \to 3\pi$
• Determination of the Dalitz plot parameter alpha for the decay eta->3pi^0 with the Crystal Ball at MAMI-B
• Measurement of the eta->3pi0 Dalitz Plot Distribution with the WASA Detector at COSY
• Predictions for the cusp in eta->3pi0 decay
• Measurement of the $\eta \to 3{\pi }^0$ slope parameter $\alpha$ with the KLOE detector
• Measurement of the $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ Dalitz plot distribution
• High-statistics measurement of the eta->3pi^0 decay at the Mainz Microtron
• $\eta$ and ${\eta }^{\prime }$ Physics at BES-III
• Dispersive construction of two-loop $P\to \pi \pi \pi$ $(P=K,\eta )$ amplitudes
• Patterns of $C$- and $CP$-violation in hadronic $\eta$ and ${\eta }^{\prime }$ three-body decays
• Status of Strong ChPT
• Analysis of discrepancies in Dalitz plot parameters in eta to 3 pion decay
• Eta and Eta' physics
• Chiral perturbation theory in the meson sector
• Eta --> 3 pi and quark masses
• Reaction pp -> pp πππas a background for hadronic decays of the eta-prime meson
• Meson-production experiments at COSY-Juelich
• Electromagnetic effects in eta --> 3 pi