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Published December 9, 2002 | Published
Journal Article Open

Q^2 Evolution of the Generalized Gerasimov-Drell-Hearn Integral for the Neutron using a ^3He Target


We present data on the inclusive scattering of polarized electrons from a polarized ^3He target at energies from 0.862 to 5.06 GeV, obtained at a scattering angle of 15.5°. Our data include measurements from the quasielastic peak, through the nucleon resonance region, and beyond, and were used to determine the virtual photon cross-section difference σ_(1/2)-σ_(3/2). We extract the extended Gerasimov-Drell-Hearn integral for the neutron in the range of four-momentum transfer squared Q^2 of 0.1–0.9   GeV^2.

Additional Information

© 2002 The American Physical Society. Received 15 May 2002; published 26 November 2002. We acknowledge the untiring support of the JLab staff. This work was supported by the U.S. Department of Energy (DOE), the DOE-EPSCoR, the U.S. National Science Foundation, NSERC of Canada, the European INTAS Foundation, the Italian INFN, and the French CEA, CNRS, and Conseil Régional d'Auvergne. The Southeastern Universities Research Association (SURA) operates the Thomas Jefferson National Accelerator Facility for the DOE under Contract No. DE-AC05-84ER40150.

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