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Measurements of the Polarization in Proton-Proton Elastic Scattering from 2.50 to 5.15 GeVc

J. H. Parry*, N. E. Booth†, G. Conforto‡, R. J. Esterling‡, J. Scheid†, and D. J. Sherden§

A. Yokosawa

  • University of Chicago and Enrico Fermi Institute, Chicago, Illinois 60637

  • Argonne National Laboratory, Argonne, Illinois 60439

  • *Present address: Computer-Based Education Research Laboratory, University of Illinois, Urbana, Illinois 61801.
  • †Present address: Nuclear Physics Laboratory, University of Oxford, Oxford, England.
  • ‡Present address: Rutherford High Energy Laboratory, Chilton, Didcot, Berkshire, England.
  • §Present address: Stanford Linear Accelerator Center, Stanford, California, 94305.
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Phys. Rev. D 8, 45 – Published 1 July, 1973

DOI: https://doi.org/10.1103/PhysRevD.8.45

Abstract

In an experiment at the Argonne Zero-Gradient Synchrotron we have measured values of the polarization parameter P(t) in the elastic scattering of negative pions, positive pions, positive kaons, and protons on protons at several incident laboratory momenta from 2.50 to 5.15 GeVc, and for values of the momentum transfer variable −t from 0.2 to 2.0 (GeVc)2. The final results from p−p elastic scattering presented here extend our knowledge of the polarization to much larger values of −t than the results of previous measurements. Outstanding features revealed by these polarization data include (1) the development of a dip at about −t=0.7 (GeVc)2, with (2) a substantial secondary peak at larger values of −t and (3) the gradual diminution of the maximum polarization with increasing energy. It is possible to fit the t dependence of the experimental results with a simple model. The energy dependence of the polarized cross sections is also discussed.

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Phys. Rev. D 8, 45– Published 1 July, 1973
  • Received 10 August 1972

© 1973 American Physical Society

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