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PoS - Proceedings of Science
Volume 310 - XVII International Conference on Hadron Spectroscopy and Structure (Hadron2017) - Session 6: QCD and hadron structure
Charge Symmetry Breaking in the Reaction dd4Heπ0 with WASA-at-COSY
M. Zurek*  on behalf of the WASA-at-COSY Collaboration
Full text: pdf
Pre-published on: February 16, 2018
Published on: March 20, 2018
Abstract
The presented analysis concentrates on the charge symmetry breaking reaction dd4Heπ0. The aim is to provide experimental results for comparison with chiral perturbation theory (ChPT) to study effects induced by quark masses on the hadronic level. In this paper the second measurement of the dd4Heπ0 reaction at Q=60 MeV using an improved WASA detector setup aiming at higher statistics is described. The total and differential cross sections have been determined. The preliminary result of the total cross section is σtotprel=(74.3±6.8(stat.)+1.210.1(syst.)±7.7(norm.))pb. The angular distribution has been described up to second order in cosθ with a function of the form dσ/dΩ=a+bcos2θ, where θ is the scattering angle of the pion in the c.m. coordinate system. The obtained preliminary parameters a and b are aprel=(1.55±0.46(stat)+0.320.8(syst))pb/sr and bprel=(13.1±2.1(stat)+1.02.7(syst))pb/sr.
DOI: https://doi.org/10.22323/1.310.0157
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