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@ARTICLE{Collaboration:836156,
author = {WASA-at-COSY Collaboration and Adlarson, P. and
Augustyniak, W. and Bardan, W. and Bashkanov, M. and
Bergmann, F. S. and Berłowski, M. and Bondar, A. and Calen,
H. and Ciepał, I. and Clement, H. and Czerwinski, E. and
Demmich, K. and Engels, Ralf W. and Erven, A. and Erven, W.
and Eyrich, W. and Fedorets, P. and Föhl, K. and Fransson,
K. and Goldenbaum, F. and Grigoryev, A. Goswami K. and
Gullström, C. -O. and Heijkenskjöld, L. and Hejny, V. and
Hüsken, N. and Jarczyk, L. and Johansson, T. and Kamys, B.
and Kemmerling, G. and Khatri, G. and Khoukaz, A. and
Khreptak, O. and Kirillov, D. A. and Kistryn, S. and
Kleines, Harald and Kłos, B. and Krzemien, W. and Kulessa,
P. and Kuzmin, A. and Lalwani, K. and Lersch, D. and
Lorentz, B. and Magiera, A. and Maier, R. and Marciniewski,
P. and Marianski, B. and Morsch, H. -P. and Ohm, H. and
Parol, W. and del Rio, E. Perez and Piskunov, N. M. and
Prasuhn, D. and Pszczel, D. and Pysz, K. and Pyszniak, A.
and Ritman, J. and Roy, A. and Rudy, Z. and Rundel, O. and
Sawant, S. and Schadmand, S. and Schätti-Ozerianska, I. and
Sefzick, T. and Serdyuk, V. and Shwartz, B. and Sitterberg,
K. and Skorodko, T. and Skurzok, M. and Smyrski, J. and
Sopov, V. and Stassen, R. and Stepaniak, J. and Stephan, E.
and Sterzenbach, G. and Stockhorst, H. and Ströher, H. and
Szczurek, A. and Trzcinski, A. and Varma, R. and Wronska, A.
and Wüstner, P. and Yamamoto, A. and Zabierowski, J. and
Zielinski, M. J. and Złomanczuk, J. and Zupranski, P. and
Zurek, M. and Büscher, Markus and Moskal, P. and Wolke, M.
and Kupsc, A.},
title = {{I}soscalar {S}ingle-{P}ion {P}roduction in the {R}egion of
{R}oper and $d^*(2380)$ {R}esonances},
reportid = {FZJ-2017-05279},
year = {2017},
abstract = {Exclusive measurements of the quasi-free $pn \to pp\pi^-$
and $pp \to pp\pi^0$ reactions have been performed by means
of $pd$ collisions at $T_p$ = 1.2 GeV using the WASA
detector setup at COSY. Total and differential cross
sections have been obtained covering the energy region $T_p
= 0.95 - 1.3$ GeV ($\sqrt s$ = 2.3 - 2.46 GeV), which
includes the regions of $\Delta(1232)$, $N^*(1440)$ and
$d^*(2380)$ resonance excitations. From these measurements
the isoscalar single-pion production has been extracted, for
which data existed so far only below $T_p$ = 1 GeV. We
observe a substantial increase of this cross section above 1
GeV, which can be related to the Roper resonance
$N^*(1440)$, the strength of which shows up isolated from
the $\Delta$ resonance in the isoscalar $(N\pi)_{I=0}$
invariant-mass spectrum. No evidence for a decay of the
dibaryon resonance $d^*(2380)$ into the isoscalar
$(NN\pi)_{I=0}$ channel is found. An upper limit of 180
$\mu$b (90 $\\%$ C.L.) corresponding to a branching ratio of
9 $\\%$ has been deduced.},
cin = {IKP-1 / IKP-2 / ZEA-2 / IKP-4 / IKP-TA},
cid = {I:(DE-Juel1)IKP-1-20111104 / I:(DE-Juel1)IKP-2-20111104 /
I:(DE-Juel1)ZEA-2-20090406 / I:(DE-Juel1)IKP-4-20111104 /
I:(DE-Juel1)IKP-TA-20111104},
pnm = {612 - Cosmic Matter in the Laboratory (POF3-612)},
pid = {G:(DE-HGF)POF3-612},
typ = {PUB:(DE-HGF)25},
eprint = {1702.07212},
howpublished = {arXiv:1702.07212},
archivePrefix = {arXiv},
SLACcitation = {$\%\%CITATION$ = $arXiv:1702.07212;\%\%$},
url = {https://juser.fz-juelich.de/record/836156},
}