ABC effect and resonance structure in the double-pionic fusion to ${}^{3}\mathrm{He}$

Adlarson, P.; Kamys, B.; Grigoryev, K.; Clement, H.; Kistryn, S.; Hüsken, N.; Augustyniak, W.; Złomańczuk, J.; Skorodko, T.; Serdyuk, V.; Calén, H.; Doroshkevich, E.; Wurm, P.; Höistad, B.; Schadmand, S.; Berłowski, M.; Zink, A.; Stassen, R.; Zieliński, M. J.; Shwartz, B.; Mariański, B.; Kłos, B.; Varma, R.; Siudak, R.; Kemmerling, G.; Khan, F. A.; Pysz, K.; WASA-at-COSY Collaboration; Mikirtychiants, M.; Lorentz, B.; Goldenbaum, F.; Goslawski, P.; Krzemień, W.; Wagner, G. J.; Magiera, A.; Pyszniak, A.; Föhl, K.; Ciepał, I.; Czerwiński, E.; Eyrich, W.; Fedorets, P.; Yamamoto, A.; Wrońska, A.; Büscher, M.; Moskal, P.; Pricking, A.; Jarczyk, L.; Bergmann, F. S.; Ohm, H.; Engels, R.; Sterzenbach, G.; Demmich, K.; Stephan, E.; Gullström, C.-O.; Bardan, W.; Johansson, T.; Ritman, J.; Sawant, S.; Stepaniak, J.; Maier, R.; Stockhorst, H.; Coderre, D.; Ströher, H.; Żuprański, P.; Bashkanov, M.; Goswami, A.; Sopov, V.; Lersch, D.; Bhatt, H.; Rudy, Z.; Fransson, K.; Podkopał, P.; Kupść, A.; Erven, A.; Kleines, H.; Smyrski, J.; Prasuhn, D.; Perez del Rio, E.; Skurzok, M.; Ozerianska, I.; Żurek, M.; Khoukaz, A.; Szczurek, A.; Bondar, A.; Trzciński, A.; Täschner, A.; Pszczel, D.; Piskunov, N. M.; Hejny, V.; Morsch, H.-P.; Kulessa, P.; Wüstner, P.; Lalwani, K.; Sefzick, T.; Kuzmin, A.; Yurev, L.; Kirillov, D. A.; Heijkenskjöld, L.; Zabierowski, J.; Roy, A.; Wolke, M.; Marciniewski, P.; Hauenstein, F.

doi:10.1103/PhysRevC.91.015201

Journal Article

FZJ-2015-00482

ABC effect and resonance structure in the double-pionic fusion to ${}^{3}\mathrm{He}$

Adlarson, P. ; Augustyniak, W. ; Bardan, W. ; Bashkanov, M. ; Bergmann, F. S. ; Berłowski, M. ; Bhatt, H.FZJ* ; Bondar, A. ; Büscher, M.FZJ* ; Calén, H. ; Ciepał, I. ; Clement, H. (Corresponding Author) ; Coderre, D. ; Czerwiński, E. ; Demmich, K. ; Doroshkevich, E. ; Engels, R.FZJ* ; Erven, A.FZJ* ; Eyrich, W. ; Fedorets, P.FZJ* ; Föhl, K. ; Fransson, K. ; Goldenbaum, F.FZJ* ; Goslawski, P. ; Goswami, A. ; Grigoryev, K.FZJ* ; Gullström, C.-O. ; Hauenstein, F.FZJ* ; Heijkenskjöld, L. ; Hejny, V.FZJ* ; Höistad, B. ; Hüsken, N. ; Jarczyk, L. ; Johansson, T. ; Kamys, B. ; Kemmerling, G.FZJ* ; Khan, F. A.FZJ* ; Khoukaz, A. ; Kirillov, D. A. ; Kistryn, S. ; Kleines, H.FZJ* ; Kłos, B. ; Krzemień, W. ; Kulessa, P.FZJ* ; Kupść, A. ; Kuzmin, A. ; Lalwani, K. ; Lersch, D.FZJ* ; Lorentz, B.FZJ* ; Magiera, A. ; Maier, R.FZJ* ; Marciniewski, P. ; Mariański, B. ; Mikirtychiants, M. ; Morsch, H.-P. ; Moskal, P. ; Ohm, H.FZJ* ; Ozerianska, I. ; Perez del Rio, E. ; Piskunov, N. M. ; Podkopał, P. ; Prasuhn, D.FZJ* ; Pricking, A. ; Pszczel, D. ; Pysz, K. ; Pyszniak, A. ; Ritman, J.FZJ* ; Roy, A. ; Rudy, Z. ; Sawant, S. ; Schadmand, S.FZJ* ; Sefzick, T.FZJ* ; Serdyuk, V.FZJ* ; Shwartz, B. ; Siudak, R. ; Skorodko, T. ; Skurzok, M. ; Smyrski, J. ; Sopov, V. ; Stassen, R.FZJ* ; Stepaniak, J. ; Stephan, E. ; Sterzenbach, G.FZJ* ; Stockhorst, H.FZJ* ; Ströher, H. ; Szczurek, A. ; Täschner, A. ; Trzciński, A. ; Varma, R. ; Wagner, G. J. ; Wolke, M. ; Wrońska, A. ; Wüstner, P.FZJ* ; Wurm, P. ; Yamamoto, A. ; Yurev, L. ; Zabierowski, J. ; Zieliński, M. J. ; Zink, A. ; Złomańczuk, J. ; Żuprański, P. ; Żurek, M.FZJ* ; WASA-at-COSY CollaborationFZJ*

2015
Inst. Woodbury, NY

Physical review / C 91(1), 015201 (2015) [10.1103/PhysRevC.91.015201]

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Please use a persistent id in citations: http://hdl.handle.net/2128/8261 doi:10.1103/PhysRevC.91.015201

Abstract: Exclusive and kinematically complete measurements of the double pionic fusion to 3He have been performed in the energy region of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the ππ-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY (the cooler synchrotron at Forschungszentrum Jülich). Similar to the observations in the basic pn→dπ0π0 reaction and in the dd→4Heπ0π0 reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. Differential cross sections are well described by the hypothesis of d∗ resonance formation during the reaction process in addition to the conventional t-channel ΔΔ mechanism. The deduced d∗ resonance width can be understood from collision broadening due to Fermi motion of the nucleons in initial and final nuclei.

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