Investigation of the dd -> (3)Hen pi(0) reaction with the FZ Julich WASA-at-COSY facility

• Published in: Physical review. C, Nuclear physics Nuclear physics, 2013, Vol.88 (1), p.014004
• Main Authors: Adlarson, Patrik, Augustyniak, W., Bardan, W., Bashkanov, M., Bergmann, F. S., Bhatt, H., Buescher, M., Calén, Hans, Ciepal, I., Clement, H., Coderre, D., Czerwinski, E., Demmich, K., Doroshkevich, E., Erven, W., Eyrich, W., Fedorets, P., Foehl, K., Fransson, Kjell E. I., Goldenbaum, F., Goslawski, P., Goswami, A., Grigoryev, K., Gullström, Carl-Oscar, Hanhart, C., Hauenstein, F., Heijkenskjöld, Lena, Hejny, V., Hinterberger, F., Hodana, M., Höistad, Bo, Jany, A., Jany, B. R., Jarczyk, L., Kamys, B., Kemmerling, G., Khan, F. A., Kirillov, D. A., Kistryn, S., Klaja, J., Kleines, H., Klos, B., Krapp, M., Krzemien, W., Kupsc, Andrzej, Lalwani, K., Lersch, D., Li, L., Lorentz, B., Magiera, A., Maier, R., Marciniewski, Pawel, Marianski, B., Mikirtychiants, M., Morsch, H. -P, Moskal, P., Nandi, B. K., Ohm, H., Ozerianska, I., Plucinski, P., Podkopal, P., Prasuhn, D., Pszczel, Damian, Pysz, K., Pyszniak, Andrzej, Redmer, C. F., Ritman, J., Roy, A., Rudy, Z., Sawant, S., Schmidt, A., Schadmand, S., Sefzick, T., Serdyuk, V., Shah, N., Siemaszko, M., Siudak, R., Skorodko, T., Skurzok, M., Smyrski, J., Stassen, R., Stepaniak, J., Sterzenbach, G., Stockhorst, H., Stroeher, H., Tolba, T., Trzcinski, A., Varma, R., Wagner, G. J., Weglorz, W., Wronska, A., Wuestner, P., Wurm, P., Yuan, X., Zabierowski, J., Zielinski, M. J., Zipper, W., Zlomanczuk, Josef, Zupranski, P., Zurek, M.
• Format: Article
• Language: English
• ISSN: 0556-2813; 1089-490X
• DOI: 10.1103/PhysRevC.88.014004

An exclusive measurement of the dd -> (3)Hen pi(0) reaction was carried out at a beam momentum of p(d) = 1.2 GeV/c using the WASA-at-COSY facility. Information on the total cross section as well as differential distributions was obtained. The data are described by a phenomenological approach based on a combination of a quasifree model and a partial wave expansion for the three-body reaction. The total cross section is found to be sigma(tot) = ( 2.89 +/- 0.01(stat) +/- 0.06(sys) +/- 0.29(norm)) mu b. The contribution of the quasifree processes ( with the beam or target neutron being a spectator) accounts for 38% of the total cross section and dominates the differential distributions in specific regions of phase space. The remaining part of the cross section can be described by a partial wave decomposition indicating the significance of p-wave contributions in the final state.