Investigation of the dd -&gt; 3He n π0 reaction with the FZ Jülich WASA-at-COSY facility
Creators: name: COSY Collaboration
name: Adlarson, P.
name: Augustyniak, W.
name: Bardan, W.
name: Bashkanov, M.
name: Bergmann, F. S.
name: Berłowski, M.
name: Bhatt, H.
name: Büscher, M.
name: Calén, H.
name: Ciepał, I.
name: Clement, H.
name: Coderre, D.
name: Czerwiński, E.
name: Demmich, K.
name: Doroshkevich, E.
name: Engels, R.
name: Erven, W.
name: Eyrich, W.
name: Fedorets, P.
name: Föhl, K.
name: Fransson, K.
name: Goldenbaum, F.
name: Goslawski, P.
name: Goswami, A.
name: Grigoryev, K.
name: Gullström, C. --O.
name: Hanhart, C.
name: Hauenstein, F.
name: Heijkenskjöld, L.
name: Hejny, V.
name: Hinterberger, F.
name: Hodana, M.
name: Höistad, B.
name: Jany, A.
name: Jany, B. R.
name: Jarczyk, L.
name: Johansson, T.
name: Kamys, B.
name: Kemmerling, G.
name: Khan, F. A.
name: Khoukaz, A.
name: Kirillov, D. A.
name: Kistryn, S.
name: Klaja, J.
name: Kleines, H.
name: Kłos, B.
name: Krapp, M.
name: Krzemień, W.
name: Kulessa, P.
name: Kupść, A.
name: Lalwani, K.
name: Lersch, D.
name: Li, L.
name: Lorentz, B.
name: Magiera, A.
name: Maier, R.
name: Marciniewski, P.
name: Mariański, B.
name: Mikirtychiants, M.
name: Morsch, H. --P.
name: Moskal, P.
name: Nandi, B. K.
name: Ohm, H.
name: Ozerianska, I.
name: del Rio, E. Perez
name: Piskunov, N. M.
name: Pluciński, P.
name: Podkopał, P.
name: Prasuhn, D.
name: Pricking, A.
name: Pszczel, D.
name: Pysz, K.
name: Pyszniak, A.
name: Redmer, C. F.
name: Ritman, J.
name: Roy, A.
name: Rudy, Z.
name: Sawant, S.
name: Schmidt, A.
name: Schadmand, S.
name: Sefzick, T.
name: Serdyuk, V.
name: Shah, N.
name: Siemaszko, M.
name: Siudak, R.
name: Skorodko, T.
name: Skurzok, M.
name: Smyrski, J.
name: Sopov, V.
name: Stassen, R.
name: Stepaniak, J.
name: Stephan, E.
name: Sterzenbach, G.
name: Stockhorst, H.
name: Ströher, H.
name: Szczurek, A.
name: Tolba, T.
name: Trzciński, A.
name: Varma, R.
name: Wagner, G. J.
name: Węglorz, W.
name: Wolke, M.
name: Wrońska, A.
name: Wüstner, P.
name: Wurm, P.
name: Yamamoto, A.
name: Yuan, X.
name: Zabierowski, J.
name: Zheng, C.
name: Zieliński, M. J.
name: Zipper, W.
name: Złomańczuk, J.
name: Żuprański, P.
name: Żurek, M.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: An exclusive measurement of the dd -&gt; 3He n π0 reaction was carried at a beam momentum of p = 1.2 GeV/c using the WASA-at-COSY facility. For the first time data on the total cross section as well as differential distributions were obtained. The data are described with a phenomenological approach based on a combination of a quasi-free model and a partial wave expansion for three-body reaction. The total cross section is found to be σ(tot) = (2.89 +- 0.01(stat) +- 0.06(sys) +- 0.29(norm)) μb. The contribution of the quasi-free processes (with the neutron being target or beam spectator) accounts for 38% of the total cross section and dominates the differential distributions in specific regions of the phase space. The remaining part of the cross section can be described within a partial wave decomposition indicating the significance of p-wave contributions in the final state.
description: 9 pages, 7 figures