Measurement of the Neutron ($^3$He) Spin Structure Functions at low $$Q^{2}$$

Conference · Fri May 01 04:00:00 EDT 2009

OSTI ID:1999611

Sulkosky, Vincent

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, 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
• Country of Publication: United States
• Language: English