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

This title appears in the Scientific Report : 2012

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

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...

Personal Name(s):	Adlarson, P.
	Augustyniak, W. / Bardan, W. / Bashkanov, M. / Bednarski, T. / Bergmann, F. / Berłowski, M. / Bhatt, H. / Brinkmann, K.-T. / Büscher, Markus / Calen, H. / Clement, H. / Coderre, Daniel / Czerwinski, E. / Demmich, K. / Doroshkevich, E. / Engels, Ralf W. / Erven, W. / Eyrich, W. / Fedorets, P. / Föhl, K. / Fransson, K. / Goldenbaum, Frank / Goslawski, P. / Grigoryev, K. / Gullström, C.-O. / Hauenstein, Florian / Heijkenskjöld, L. / Hejny, Volker / 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, Daniel / Li, L. / Lorentz, Bernd / Magiera, A. / Maier, Rudolf / Marciniewski, P. / Mariański, B. / Mikirtychiants, M. / Morsch, H.-P. / Moskal, P. / Nandi, B. / Niedźwiecki, S. / Ohm, Henner / Ozerianska, I. / Pauly, C. / Perez del Rio, E. / Petukhov, Y. / Plucinski, P. / Podkopał, P. / Prasuhn, Dieter / Pricking, A. / Pszczel, D. / Pysz, K. / Pyszniak, A. / Redmer, C. / Ritman, James / Roy, A. / Rudy, Z. / Sawant, S. / Schadmand, Susan / Schmidt-Eisenlohr, A. / Serdyuk, V. / Shah, N. / Siudak, R. / Skorodko, T. / Skurzok, M. / Smyrski, J. / Sopov, V. / Stassen, Rolf / Stepaniak, J. / Sterzenbach, Guenter / Stockhorst, Hans / Stroeher, Hans / Szczurek, A. / Tolba, T. / Trzciński, A. / Varma, R. / Vlasov, P. N. / Wagner, G. A. / Weglorz, W. / Wolke, M. / Wronska, A. / Wüstner, Peter / Wurm, Patrick / Yamamoto, A. / Yuan, X. / Yurev, L. / Zabierowski, J. / Zheng, C. / Zielinski, M. J. / Zipper, W. / Złomańczuk, J. / Zupranski, P.
Contributing Institute:	Kernphysikalische Großgeräte; IKP-4 Experimentelle Hadrondynamik; IKP-2 IKP- Technische und Administrative Infrastruktur; IKP-TA Experimentelle Hadronstruktur; IKP-1
Published in:	Physical Review C Physical review / C, 86 86 (2012 2012) 3 3, S. 032201 032201
Imprint:	Woodbury, NY Inst. 2012 2012-09-07 2012-09-01
DOI:	10.1103/PhysRevC.86.032201
Document Type:	Journal Article
Research Program:	COSY Hadron Structure and Dynamics (HSD)
Subject (ZB):	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
Link:	OpenAccess OpenAccess
	Publikationsportal JuSER

Please use the identifier: http://dx.doi.org/10.1103/PhysRevC.86.032201 in citations.
Please use the identifier: http://hdl.handle.net/2128/10236 in citations.

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.