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Measurement of the Absolute np Scattering Differential Cross Section at 194 MeV

M. Sarsour·T. Peterson·M. Planinic·S. E. Vigdor·C. Allgower·B. Bergenwall·J. Blomgren·T. Hossbach·W. W. Jacobs·C. Johansson·J. Klug·A. V. Klyachko·P. Nadel-Turonski·L. Nilsson·N. Olsson·S. Pomp·J. Rapaport·T. Rinckel·E. J. Stephenson·U. Tippawan·S. W. Wissink·Y. Zhou
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Abstract

We describe a double-scattering experiment with a novel tagged neutron beam to measure differential cross sections for np back-scattering to better than 2% absolute precision. The measurement focuses on angles and energies where the cross section magnitude and angle-dependence constrain the charged pion-nucleon coupling constant, but existing data show serious discrepancies among themselves and with energy-dependent partial wave analyses (PWA). The present results are in good accord with the PWA, but deviate systematically from other recent measurements.

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M. Sarsour, T. Peterson, M. Planinic, S. E. Vigdor, C. Allgower, B. Bergenwall, J. Blomgren, T. Hossbach, W. W. Jacobs, C. Johansson, J. Klug, A. V. Klyachko, P. Nadel-Turonski, L. Nilsson, N. Olsson, S. Pomp, J. Rapaport, T. Rinckel, E. J. Stephenson, U. Tippawan, S. W. Wissink, Y. Zhou. 2004-12-11. Measurement of the Absolute np Scattering Differential Cross Section at 194 MeV. https://doi.org/10.1103/physrevlett.94.082303

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