Measurement of the Neutron ($^3$He) Spin Structure Functions at low $$Q^{2}$$
Experiment E97-110 was performed at Jefferson Lab in Hall A to examine the neutron and $$^{3}$$He spin structure. A longitudinally-polarized electron beam (1.1 $$\leq E \leq$$ 4.4 GeV) was scattered from a longitudinally or transversely polarized $$^{3}$$He target. Polarized cross-section differences were measured to extract the spin structure functions $$g_{1}(x,Q^{2})$$ and $$g_{2}(x,Q^{2})$$. The extended Gerasimov-Drell-Hearn integral and the moments of the neutron and $$^{3}$$He spin structure functions were extracted at very low momentum transfers (0.02 $$< Q^{2} <$$ 0.3 GeV$$^{2}$$). This $$Q^{2}$$ range allows us to make a benchmark-check of chiral perturbation theory calculations. The experimental details will be discussed and results on moments of the spin structure functions will be presented.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1999611
- Report Number(s):
- JLAB-PHY-09-1021; DOE/OR/23177-0807
- Resource Relation:
- Conference: 2009 APS April Meeting, May 2–5, 2009; Denver, Colorado
- Country of Publication:
- United States
- Language:
- English
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