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Published December 1, 1997 | public
Journal Article Open

Spin-polarization response functions in high-energy (e→,e′,p→) reactions


Spin-polarization response functions for the high-energy (e→,e′p→) reaction are examined by computing all 18 response functions for proton kinetic energies of 0.515 and 3.170 GeV from an 16O target. The Dirac eikonal formalism is applied to account for the final-state interactions. It is found to yield the response functions in good agreement with those calculated by partial-wave expansion at 0.5 GeV. We identify the response functions that are dominantly determined by the spin-orbit potential in the final-state interaction. Dependence on the Dirac- or Pauli-type current of the nucleon is investigated in the helicity-dependent response functions, and the normal-component polarization of the knocked-out proton is computed.

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©1997 The American Physical Society Received 3 June 1997 We would like to acknowledge Professor J. W. Van Orden for providing response functions calculated by the partial-wave decomposition method. R.S. thanks Dr. W. R. Greenberg for clarifying symmetry properties of the response functions and G. A. Miller for useful comments which have improved the manuscript. We have benefited from a Dirac eikonal calculation of the high-energy (eW ,e8p) reaction by Dr. A. Allder. This work was supported by the National Science Foundation grant at Caltech (PHY-9412818 and PHY-9420470), and by the U.S. Department of Energy grant at George Washington Univ. (DE-FG02-95-ER40907) and at CSUN (DE-FG03-87ER40347).


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