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Elastic and charge exchange scattering of pions on3He in the (3,3)-resonance region

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

The elastic scattering of pions from3He and the single charge exchange reaction3He(π −,π 0)3H are calculated in the energy domain of the (3,3)-resonance within the framework of Glauber's theory, including spin and isospin degrees of freedom in all orders. It is pointed out that, from the first minimum on, the differential cross section strongly depends on the parametrization of theπN amplitude, especially on its continuation into the unphysical region of momentum transfer. Single and double spin flip contributions prove to be very important in the charge exchange reaction. Within a modified version of Glauber's formalism, directly usingπN phase shifts rather than amplitudes, the3He charge exchange scattering is reexamined. Whereas the shape of the angle-integrated cross section as a function of pion energy is confirmed, the magnitude is still uncertain within a factor of 2.

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Authors and Affiliations

  1. Institut für Theoretische Physik der Universität Heidelberg, Heidelberg, W. Germany

    K. P. Lohs & V. B. Mandelzweig

Authors
  1. K. P. Lohs
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  2. V. B. Mandelzweig
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Supported in part by the “Minerva” foundation for scientific cooperation between Israeli and German research institutes.

On leave from the Racah Institute of Physics, the Hebrew University of Jerusalem, Israel.

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Lohs, K.P., Mandelzweig, V.B. Elastic and charge exchange scattering of pions on3He in the (3,3)-resonance region. Z Physik A 283, 51–61 (1977). https://doi.org/10.1007/BF01434064

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  • DOI: https://doi.org/10.1007/BF01434064

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