Measurement of the Slope Parameter for the eta->3pi0 Decay in the pp->pp eta Reaction
M. Bashkanov, D. Bogoslawsky, H. Cal\'en, F. Capellaro, H. Clement, L., Demir\"ors, C. Ekstr\"om, K. Fransson, L. Gustafsson, B. H\"oistad, G., Ivanov, M. Jacewicz, E. Jiganov, T. Johansson, S. Keleta, I. Koch, S., Kullander, A. Kupsc, A. Kuznetsov, P. Marciniewski, R. Meier
TL;DR
This paper reports a measurement of the quadratic slope parameter alpha for the eta->3pi0 decay, using proton-proton collisions at specific energies, providing experimental data to compare with theoretical models.
Contribution
The study presents the first measurement of the slope parameter alpha for eta->3pi0 decay in pp collisions at these energies, with detailed Dalitz plot analysis.
Findings
Measured alpha = -0.026 +/- 0.014
Results are consistent with recent experiments
Data compared with theoretical predictions
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.
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