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Measurements of the antiproton-proton elastic cross section in the beam momentum range between 180 and 600 MeV/c

  • Heavy Ion Physics
  • Published:
Zeitschrift für Physik A Hadrons and Nuclei

Abstract

The differential cross section for antiproton-proton elastic scattering has been measured for the beam momenta between 180 and 600 MeV/c. The real-to-imaginary ratio of the forward elastic scattering amplitude is derived from the Coulomb-nuclear interference. The ratio is found to be close to zero between 180 and 500 MeV/c with a minimum ofρ=−0.14 at 260 MeV/c. This result is contrary to model predictions. The phase shifts for thes-,p- andd-waves are extracted. The partial wave compositions of the elastic and inelastic cross sections have been determined. A large contribution of thep-wave is identified in the antiproton-proton interactions at small momenta.

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Author information

Author notes

  1. H. Döbbeling & H. Kneis

    Present address: PSI, Villingen, Switzerland

  2. S. Majewski

    Present address: University of Florida, Gainesville, Fla, USA

  3. M. Nomachi

    Present address: KEK, Tsukuba, Ibaraki, Japan

  4. M. Treichel

    Present address: Neuchâtel University, Switzerland

Authors and Affiliations

  1. Max-Planck-Institut für Kernphysik, W-6900, Heidelberg, Federal Republic of Germany

    W. Brückner, K. Dworschak, H. Kneis, S. Paul, B. Povh & M. Treichel

  2. Physikalisches Institut der Universität, W-6900, Heidelberg, Federal Republic of Germany

    H. Döbbeling, S. Majewski, M. Nomachi & T. -A. Shibata

  3. Institut für Kernphysik der Universität, W-6500, Mainz, Federal Republic of Germany

    Th. Walcher

  4. Rutgers University, Piscataway, NJ, USA

    R. D. Ransome

  5. Université Laval, Québec, Canada

    B. Cujec

Authors
  1. W. Brückner
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  2. B. Cujec
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  3. H. Döbbeling
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  6. S. Majewski
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  7. M. Nomachi
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  8. S. Paul
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Brückner, W., Cujec, B., Döbbeling, H. et al. Measurements of the antiproton-proton elastic cross section in the beam momentum range between 180 and 600 MeV/c. Z. Physik A - Hadrons and Nuclei 339, 367–377 (1991). https://doi.org/10.1007/BF01560639

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  • DOI: https://doi.org/10.1007/BF01560639

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