Abashian-Booth-Crowe resonance structure in the double pionic fusion to ^{4}He

Adlarson, P.; Yuan, X.; Grigoryev, K.; Clement, H.; Kistryn, S.; Augustyniak, W.; Brinkmann, K.-T.; Złomańczuk, J.; Skorodko, T.; Serdyuk, V.; Doroshkevich, E.; Wronska, A.; Höistad, B.; Stassen, Rolf; Berłowski, M.; Hauenstein, Florian; Calen, H.; Lorentz, Bernd; Hinterberger, F.; Weglorz, W.; Mariański, B.; Kłos, B.; Varma, R.; Pauly, C.; Lersch, Daniel; Siudak, R.; Ohm, Henner; Khan, F. A.; Pysz, K.; Schmidt-Eisenlohr, A.; Jany, B. R.; Erven, W.; Zipper, W.; Bergmann, F.; Mikirtychiants, M.; Plucinski, P.; Goslawski, P.; Engels, Ralf W.; Klaja, J.; Zupranski, P.; Sterzenbach, Guenter; Magiera, A.; Tolba, T.; Föhl, K.; Zheng, C.; Eyrich, W.; Fedorets, P.; Niedźwiecki, S.; Yamamoto, A.; Jany, A.; Hodana, M.; Zielinski, M. J.; Krzemien, W.; Moskal, P.; Pricking, A.; Jarczyk, L.; Kamys, B.; Husmann, C.; Goldenbaum, Frank; Wüstner, Peter; Demmich, K.; Büscher, Markus; Gullström, C.-O.; Bardan, W.; Johansson, T.; Schadmand, Susan; Sawant, S.; Kupsc, A.; Ritman, James; Shah, N.; Bashkanov, M.; Sopov, V.; Hejny, Volker; Bhatt, H.; Rudy, Z.; Khoukaz, A.; Fransson, K.; Podkopał, P.; Vlasov, P. N.; Prasuhn, Dieter; Kleines, H.; Czerwinski, E.; Smyrski, J.; Pyszniak, A.; Redmer, C.; Wurm, Patrick; Perez del Rio, E.; Skurzok, M.; Ozerianska, I.; Petukhov, Y.; Szczurek, A.; Maier, Rudolf; Stockhorst, Hans; Nandi, B.; Trzciński, A.; Pszczel, D.; Stroeher, Hans; Stepaniak, J.; Morsch, H.-P.; Lalwani, K.; Kulessa, B.; Li, L.; Yurev, L.; Heijkenskjöld, L.; Coderre, Daniel; Bednarski, T.; Zabierowski, J.; Kemmerling, F. G.; Roy, A.; Wolke, M.; Marciniewski, P.; Wagner, G. A.

doi:10.1103/PhysRevC.86.032201

Abashian-Booth-Crowe resonance structure in the double pionic fusion to ^{4}He

Adlarson, P. ; Augustyniak, W. ; Bardan, W. ; Bashkanov, M. ; Bednarski, T. ; Bergmann, F. ; Berłowski, M. ; Bhatt, H. ; Brinkmann, K.-T. ; Büscher, M.FZJ* ; Calen, H. ; Clement, H. ; Coderre, D.FZJ* ; Czerwinski, E. ; Demmich, K. ; Doroshkevich, E. ; Engels, R. W.FZJ* ; Erven, W. ; Eyrich, W. ; Fedorets, P. ; Föhl, K. ; Fransson, K. ; Goldenbaum, F.FZJ* ; Goslawski, P. ; Grigoryev, K. ; Gullström, C.-O. ; Hauenstein, F.FZJ* ; Heijkenskjöld, L. ; Hejny, V.FZJ* ; Hinterberger, F. ; Hodana, M. ; Höistad, B. ; Husmann, C. ; Jany, A. ; Jany, B. R. ; Jarczyk, L. ; Johansson, T. ; Kamys, B. ; Kemmerling, F. G. ; Khan, F. A. ; Khoukaz, A. ; Kistryn, S. ; Klaja, J. ; Kleines, H. ; Kłos, B. ; Krzemien, W. ; Kulessa, B. ; Kupsc, A. ; Lalwani, K. ; Lersch, D.FZJ* ; Li, L. ; Lorentz, B.FZJ* ; Magiera, A. ; Maier, R.FZJ* ; Marciniewski, P. ; Mariański, B. ; Mikirtychiants, M. ; Morsch, H.-P. ; Moskal, P. ; Nandi, B. ; Niedźwiecki, S. ; Ohm, H.FZJ* ; Ozerianska, I. ; Pauly, C. ; Perez del Rio, E. ; Petukhov, Y. ; Plucinski, P. ; Podkopał, P. ; Prasuhn, D.FZJ* ; Pricking, A. ; Pszczel, D. ; Pysz, K. ; Pyszniak, A. ; Redmer, C. ; Ritman, J.FZJ* ; Roy, A. ; Rudy, Z. ; Sawant, S. ; Schadmand, S.FZJ* ; Schmidt-Eisenlohr, A. ; Serdyuk, V. ; Shah, N. ; Siudak, R. ; Skorodko, T. ; Skurzok, M. ; Smyrski, J. ; Sopov, V. ; Stassen, R.FZJ* ; Stepaniak, J. ; Sterzenbach, G.FZJ* ; Stockhorst, H.FZJ* ; Stroeher, H.FZJ* ; Szczurek, A. ; Tolba, T. ; Trzciński, A. ; Varma, R. ; Vlasov, P. N. ; Wagner, G. A. ; Weglorz, W. ; Wolke, M. ; Wronska, A. ; Wüstner, P.ZEA-2*FZJ* ; Wurm, P.FZJ* ; Yamamoto, A. ; Yuan, X. ; Yurev, L. ; Zabierowski, J. ; Zheng, C. ; Zielinski, M. J. ; Zipper, W. ; Złomańczuk, J. ; Zupranski, P.

2012
Inst. Woodbury, NY

Physical review / C 86(3), 032201 (2012) [10.1103/PhysRevC.86.032201]

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Please use a persistent id in citations: http://hdl.handle.net/2128/10236 doi:10.1103/PhysRevC.86.032201

Abstract: Exclusive and kinematically complete high-statistics measurements of the double pionic fusion reaction $dd \to ^4$He$\pi^0\pi^0$ have been performed in the energy range 0.8 - 1.4 GeV covering thus the region of the ABC effect, which denotes a pronounced low-mass enhancement in the $\pi\pi$-invariant mass spectrum. The experiments were carried out with the WASA detector setup at COSY. Similar to the observation in the basic $pn \to d \pi^0\pi^0$ reaction, the data reveal a correlation between the ABC effect and a resonance-like energy dependence in the total cross section. The maximum occurs at m=2.37 GeV + 2$m_N$, i.e. at the same position as in the basic reaction. The observed resonance width $\Gamma \approx$ 160 MeV can be understood from broadening due to Fermi motion of the nucleons in initial and final nuclei together with collision damping. Differential cross sections are described equally well by the hypothesis of a $pn$ resonance formation during the reaction process.

Keyword(s): mass spectrum: two-pion ; resonance: width ; deuteron deuteron: fusion ; differential cross section: angular dependence ; channel cross section: energy dependence ; Juelich COSY PS ; WASA ; pi0: pair production ; experimental results ; deuteron deuteron --> helium 2pi0 ; 0.4-0.7 GeV/nucleon

Classification:

ddc:530

Contributing Institute(s):

Research Program(s):

Experiment(s):

WASA (Wide Angle Shower Apparatus) at COSY

Appears in the scientific report 2012

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; Current Contents - Social and Behavioral Sciences ; JCR ; Nationallizenz

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