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Study of spectator tagging in the reaction np → ppπwith a deuteron beam

  • Hadron Physics
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Abstract.

The reaction \(dp \ensuremath \rightarrow ppp \pi^-\) has been studied in a kinematically complete experiment at a single beam momentum \(\ensuremath p_{d}=1.85\)GeV/c (T = 759MeV). All four ejectiles have been detected in the large-acceptance time-of-flight spectrometer COSY-TOF. We analyzed the data along the lines of the spectator model as a means to isolate the quasi-free \(\ensuremath np\rightarrow pp\pi^-\) reaction. The spectator proton was identified by its momentum and flight direction thus yielding access to the associated Fermi motion of the bound neutron. A comparison is carried out with Monte Carlo simulations based on two different parameterizations of the deuteron wave function. Up to a Fermi momentum of roughly 150MeV/c no significant deviations between experimental and simulated data of various observables were found from which we conclude that the deuteron can indeed be taken as a valid substitute for the neutron.

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Authors and Affiliations

  1. Institut für Kern- und Teilchenphysik, Technische Universität Dresden, D-01062, Dresden, Germany

    K. -Th. Brinkmann, S. Dshemuchadse, H. Freiesleben, R. Jäkel, L. Karsch, E. Kuhlmann, P. Schönmeier, M. Schulte-Wissermann & G. Y. Sun

  2. Physikalisches Institut, Universität Erlangen, D-91058, Erlangen, Germany

    W. Eyrich, C. Pizzolotto, W. Schroeder, A. Teufel & M. Wagner

  3. Physikalisches Institut, Universität Tübingen, D-72076, Tübingen, Germany

    H. Clement, E. Doroshkevich, A. Erhardt & G. J. Wagner

  4. Institut für Kernphysik, Forschungszentrum Jülich, D-52425, Jülich, Germany

    M. Abdel-Bary, A. Gillitzer, K. Kilian, H. P. Morsch, N. Paul, J. Ritman, E. Roderburg, A. Ucar, P. Wintz & P. Wüstner

  5. Institut für Kern- und Hadronenphysik, Forschungszentrum Rossendorf, D-01314, Dresden, Germany

    K. Möller & L. Naumann

  6. Andrzej Soltan Institute for Nuclear Studies, PL-00681, Warsaw, Poland

    P. Zupranski

Authors
  1. M. Abdel-Bary
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  2. K. -Th. Brinkmann
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  3. H. Clement
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  4. E. Doroshkevich
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  5. S. Dshemuchadse
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  6. A. Erhardt
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  7. W. Eyrich
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  8. H. Freiesleben
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  9. A. Gillitzer
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  10. R. Jäkel
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  11. L. Karsch
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  12. K. Kilian
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  13. E. Kuhlmann
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  14. K. Möller
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  15. H. P. Morsch
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  16. L. Naumann
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  17. N. Paul
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  18. C. Pizzolotto
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  19. J. Ritman
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  20. E. Roderburg
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  21. P. Schönmeier
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  23. M. Schulte-Wissermann
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  24. G. Y. Sun
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  25. A. Teufel
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  26. A. Ucar
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  27. G. J. Wagner
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  28. M. Wagner
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  29. P. Wintz
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  30. P. Wüstner
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  31. P. Zupranski
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The COSY-TOF Collaboration

Corresponding author

Correspondence to E. Kuhlmann.

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M. Garçon

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The COSY-TOF Collaboration., Abdel-Bary, M., Brinkmann, K.T. et al. Study of spectator tagging in the reaction np → ppπwith a deuteron beam. Eur. Phys. J. A 29, 353–361 (2006). https://doi.org/10.1140/epja/i2006-10099-3

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  • DOI: https://doi.org/10.1140/epja/i2006-10099-3

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