Continuum polarization transfer in 500 MeV proton scattering and pionic collectivity in nuclei

Phys. Rev. C 34, 627 – Published 1 August 1986
L. B. Rees, J. M. Moss, T. A. Carey, K. W. Jones, J. B. McClelland, N. Tanaka, A. D. Bacher, and H. Esbensen


A complete set of polarization transfer observables was measured for inclusive 500 MeV proton scattering from H2, Ca(nat.), and Pb(nat.) at thetalab=18.5° (q=1.75 fm-1). The excitation energy ranged over the entire quasielastic peak from 20 to 100 MeV. Longitudinal and transverse spin-flip probabilities were extracted from the data. These have simple model-dependent connections to the spin-longitudinal and transverse response functions for the heavy targets. Detailed analysis of the data reveals no evidence for collective enhancement in the spin-longitudinal response function. The relation of this analysis to the interpretation of the European Muon Collaboration effect in terms of excess pions is discussed in detail.


  • Received 13 January 1986
  • Published in the issue dated August 1986

© 1986 The American Physical Society

Authors & Affiliations

L. B. Rees, J. M. Moss, T. A. Carey, K. W. Jones, J. B. McClelland, and N. Tanaka

  • Los Alamos National Laboratory, Los Alamos, New Mexico 87545

A. D. Bacher

  • Indiana University Cyclotron Facility, Bloomington, Indiana 47405

H. Esbensen

  • Argonne National Laboratory, Argonne, Illinois 60439

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