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@INPROCEEDINGS{Zurek:189845,
author = {Zurek, Maria},
title = {{C}harge {S}ymmetry {B}reaking in the $dd
\rightarrow\,^{4}\mathrm{{H}e}\pi^{0}$ {R}eaction with
{WASA}-at-{COSY}},
reportid = {FZJ-2015-02851},
year = {2015},
abstract = {Investigations of charge symmetry breaking is one of the
key topics for the WASA-at-COSY experiment. The study
concentrates on the charge symmetry forbidden $dd
\rightarrow\,^{4}\mathrm{He}\pi^{0}$ reaction. The aim is to
compare the experimental results with Chiral Perturbation
Theory predictions, probing hadronic effects of the up and
down quarks mass difference. It was found that previous data
taken close to the reaction threshold were consistent with
$s$-wave. In order to probe also $p$-wave contributions, new
data at sufficiently high energy were required. The
measurement should comprise the charge symmetry forbidden
$dd \rightarrow\,^{4}\mathrm{He}\pi^{0}$ reaction and the
charge symmetry conserving reaction $dd
\rightarrow\,^{3}\mathrm{He}n\pi^{0}$ to provide
additionally the experimental input for the description of
the initial state interactions. Results on the $dd
\rightarrow\,^{3}\mathrm{He}n\pi^{0}$ and $dd
\rightarrow\,^{4}\mathrm{He}\pi^{0}$ reactions with the WASA
detector setup at a beam momentumof 1.2 GeV/$c$ will be
presented. In addition, the status of the recent high
statistics run in spring 2014 will be discussed.},
month = {Mar},
date = {2015-03-23},
organization = {DPG-Frühjahrstagung Heidelberg 2015,
Heidelberg (Germany), 23 Mar 2015 - 27
Mar 2015},
subtyp = {Other},
cin = {IKP-2},
cid = {I:(DE-Juel1)IKP-2-20111104},
pnm = {631 - Accelerator R $\&$ D (POF3-631)},
pid = {G:(DE-HGF)POF3-631},
experiment = {EXP:(DE-Juel1)WASA-at-COSY-20170712},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/189845},
}