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Adlarson, P. [Author]; Augustyniak, W. [Author]; Clement, H. [Author]; Wüstner, P. [Author]; Wurm, P. [Author]; Yamamoto, A. [Author]; Yuan, X. [Author]; Yurev, L. [Author]; Zabierowski, J. [Author]; Zheng, C. [Author]; Zieliński, M. J. [Author]; Zipper, W. [Author]; Złomańczuk, J. [Author]; Coderre, D. [Author]; Żuprański, P. [Author]; Żurek, M. [Author]; Engels, Ralf W. [Author]; Stroeher, Hans [Author]; Czerwiński, E. [Author]; Demmich, K. [Author]; Doroshkevich, E. [Author]; Erven, W. [Author]; Eyrich, W. [Author]; Fedorets, P. [Author]; [...]

Search for η-mesic ^{4}He with the WASA-at-COSY detector

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  • Media type: E-Article
  • Title: Search for η-mesic ^{4}He with the WASA-at-COSY detector
  • Contributor: Adlarson, P. [Author]; Augustyniak, W. [Author]; Clement, H. [Author]; Wüstner, P. [Author]; Wurm, P. [Author]; Yamamoto, A. [Author]; Yuan, X. [Author]; Yurev, L. [Author]; Zabierowski, J. [Author]; Zheng, C. [Author]; Zieliński, M. J. [Author]; Zipper, W. [Author]; Złomańczuk, J. [Author]; Coderre, D. [Author]; Żuprański, P. [Author]; Żurek, M. [Author]; Engels, Ralf W. [Author]; Stroeher, Hans [Author]; Czerwiński, E. [Author]; Demmich, K. [Author]; Doroshkevich, E. [Author]; Erven, W. [Author]; Eyrich, W. [Author]; Fedorets, P. [Author]; [...]
  • imprint: Inst., 2013
  • Published in: Physical review / C 87(3), 035204 (2013). doi:10.1103/PhysRevC.87.035204
  • Language: English
  • DOI: https://doi.org/10.1103/PhysRevC.87.035204
  • ISSN: 0556-2813; 1089-490X
  • Origination:
  • Footnote: Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
  • Description: An exclusive measurement of the excitation function for the dd->3Heppi- reaction was performed at the Cooler Synchrotron COSY-Juelich with the WASA-at-COSY detection system. The data were taken during a slow acceleration of the beam from 2.185 GeV/c to 2.400 GeV/c crossing the kinematic threshold for the eta meson production in the dd->4He-eta reaction at 2.336 GeV/c. The corresponding excess energy with respect to the 4He-eta system varied from -51.4MeV to 22MeV. The integrated luminosity in the experiment was determined using the dd->3Hen reaction. The shape of the excitation function for the dd->3Heppi- was examined. No signal of the 4He-eta bound state was observed. An upper limit for the cross-section for the bound state formation and decay in the process dd->(4He-eta)bound->3Heppi- was determined on the 90% confidence level and it varies from 20nb to 27nb for the bound state width ranging from 5MeV to 35MeV, respectively.
  • Access State: Open Access