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Published July 11, 2008 | Published
Journal Article Open

^3He spin-dependent cross sections and sum rules


We present a measurement of the spin-dependent cross sections for the ^3He(e,e) X reaction in the quasielastic and resonance regions at a four-momentum transfer 0:1 ≤ Q^2 ≤ 0:9 GeV^2. The spin-structure functions have been extracted and used to evaluate the nuclear Burkhardt-Cottingham and extended Gerasimov-Drell-Hearn sum rules for the first time. The data are also compared to an impulse approximation calculation and an exact three-body Faddeev calculation in the quasielastic region.

Additional Information

© 2008 The American Physical Society. Received 18 March 2008; published 11 July 2008. This work was supported by the U.S. Department of Energy, the National Science Foundation, the French Commissariat à l'Energie Atomique (CEA), the Centre National de la Recherche Scientifique (CNRS), and the Helmholtz Association through the virtual institute ''Spin and strong QCD'' (No. VH-VI-231). The numerical calculations were performed on the IBM Regatta p690 of the NIC in Ju¨lich, Germany. The Southeastern Universities Research Association operates the Thomas Jefferson National Accelerator Facility for the DOE under Contract No. DE-AC05-84ER40150, mod. No. 175. PACS numbers: 25.30.Rw, 11.55.Hx, 13.60.Hb, 24.70.+s

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