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The European Physical Journal A

, Volume 45, Issue 1, pp 11–21 | Cite as

Production of \( \eta\) and 3\( \pi\) mesons in the pd \( \rightarrow\) 3HeX reaction at 1360 and 1450 MeV

  • K. Schönning
  • Chr. Bargholtz
  • M. Bashkanov
  • M. Berlowski
  • D. Bogoslawsky
  • H. Calén
  • H. Clement
  • L. Demirörs
  • C. Ekström
  • K. Fransson
  • L. Gerén
  • L. Gustafsson
  • B. Höistad
  • G. Ivanov
  • M. Jacewicz
  • E. Jiganov
  • T. Johansson
  • S. Keleta
  • O. Khakimova
  • F. Kren
  • S. Kullander
  • A. Kupsc
  • A. Kuzmin
  • K. Lindberg
  • P. Marciniewski
  • B. Morosov
  • W. Oelert
  • C. Pauly
  • H. Petrén
  • Y. Petukhov
  • A. Povtorejko
  • W. Scobel
  • R. Shafigullin
  • B. Shwartz
  • T. Skorodko
  • V. Sopov
  • J. Stepaniak
  • P. -E. Tegnér
  • P. Thörngren Engblom
  • V. Tikhomirov
  • A. Turowiecki
  • G. J. Wagner
  • M. Wolke
  • J. Zabierowski
  • I. Zartova
  • J. Złomanczuk
Open Access
Regular Article - Experimental Physics
  • 215 Downloads

Abstract.

The cross-sections of the pd \( \rightarrow\) 3He\( \eta\) , pd \( \rightarrow\) 3He \( \pi^{0}_{}\) \( \pi^{0}_{}\) \( \pi^{0}_{}\) and pd \( \rightarrow\) 3He \( \pi^{+}_{}\) \( \pi^{-}_{}\) \( \pi^{0}_{}\) reactions have been measured at the beam kinetic energies T p= 1360 MeV and T p= 1450 MeV using the CELSIUS/WASA detector setup. At both energies, the differential cross-section \(\tfrac{{d\sigma }} {{d\Omega }}\) of the \( \eta\) meson in the pd \( \rightarrow\) 3He\( \eta\) reaction shows a strong forward-backward asymmetry in the CMS. The ratio between the pd \( \rightarrow\) 3He \( \pi^{+}_{}\) \( \pi^{-}_{}\) \( \pi^{0}_{}\) and pd \( \rightarrow\) 3He \( \pi^{0}_{}\) \( \pi^{0}_{}\) \( \pi^{0}_{}\) cross-sections has been analysed in terms of isospin amplitudes. The reconstructed invariant-mass distributions of the \( \pi\) \( \pi\) ,

3He\(\displaystyle \pi\)and

3He2\( \pi\) systems provide hints on the role of nucleon resonances in the 3\( \pi\) production process.

Keywords

Phase Space Angular Distribution Invariant Mass Systematic Uncertainty Background Simulation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Author(s) 2010

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Open AccessThis is an open access article distributed under the terms of the Creative Commons Attribution Noncommercial License (https://creativecommons.org/licenses/by-nc/2.0), which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • K. Schönning
    • 1
  • Chr. Bargholtz
    • 2
  • M. Bashkanov
    • 3
  • M. Berlowski
    • 4
  • D. Bogoslawsky
    • 5
  • H. Calén
    • 1
  • H. Clement
    • 3
  • L. Demirörs
    • 6
  • C. Ekström
    • 7
  • K. Fransson
    • 1
  • L. Gerén
    • 2
  • L. Gustafsson
    • 1
  • B. Höistad
    • 1
  • G. Ivanov
    • 5
  • M. Jacewicz
    • 1
  • E. Jiganov
    • 5
  • T. Johansson
    • 1
  • S. Keleta
    • 1
  • O. Khakimova
    • 3
  • F. Kren
    • 3
  • S. Kullander
    • 1
  • A. Kupsc
    • 1
  • A. Kuzmin
    • 8
  • K. Lindberg
    • 2
  • P. Marciniewski
    • 1
  • B. Morosov
    • 5
  • W. Oelert
    • 9
  • C. Pauly
    • 6
  • H. Petrén
    • 1
  • Y. Petukhov
    • 5
  • A. Povtorejko
    • 5
  • W. Scobel
    • 6
  • R. Shafigullin
    • 10
  • B. Shwartz
    • 8
  • T. Skorodko
    • 3
  • V. Sopov
    • 11
  • J. Stepaniak
    • 4
  • P. -E. Tegnér
    • 2
  • P. Thörngren Engblom
    • 2
  • V. Tikhomirov
    • 5
  • A. Turowiecki
    • 12
  • G. J. Wagner
    • 3
  • M. Wolke
    • 9
  • J. Zabierowski
    • 13
  • I. Zartova
    • 2
  • J. Złomanczuk
    • 1
  1. 1.Department of Physics and AstronomyUppsala UniversityUppsalaSweden
  2. 2.Department of PhysicsStockholm UniversityStockholmSweden
  3. 3.Physikalisches Institut der Universität TübingenTübingenGermany
  4. 4.Sołtan Institute of Nuclear StudiesWarsawPoland
  5. 5.Joint Institute for Nuclear ResearchDubnaRussia
  6. 6.Institut für ExperimentalphysikUniversität HamburgHamburgGermany
  7. 7.The Svedberg LaboratoryUppsalaSweden
  8. 8.Budker Institute of Nuclear PhysicsNovosibirskRussia
  9. 9.Institut für KernphysikForschungszentrum Jülich GmbHJülichGermany
  10. 10.Moscow Engineering Physics InstituteMoscowRussia
  11. 11.Institute of Theoretical and Experimental PhysicsMoscowRussia
  12. 12.Institute of Experimental PhysicsUniversity of WarsawWarsawPoland
  13. 13.Soltan Institute of Nuclear StudiesLodzPoland

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