Neutron spin sum rules and spin polarizabilities at low Q2
Experiment E97-110 was performed at Jefferson Lab in Hall A to study the neutron and 3He spin structure. A longitudinally-polarized electron beam with energy from 1.1 GeV to 4.4 GeV was scattered from a longitudinally or transversely polarized 3He target. Polarized cross-section differences were measured to extract the spin-dependent structure functions g_1(x,Q^2) and g_2(x,Q^2). From the measured structure functions, moments of the neutron and 3He spin structure functions were then extracted at very low four-momentum transfers between 0.02 and 0.3 GeV^2. This Q^2 range allows us to make a benchmark-check of chiral perturbation theory calculations and examine the extended Gerasimov-Drell-Hearn integral as Q^2 -> 0. In this talk, the experimental details will be discussed, and results on moments of the neutron spin structure functions will be presented including the spin polarizabilities.
- 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:
- 1999752
- Report Number(s):
- JLAB-PHY-09-949; DOE/OR/23177-0872
- Journal Information:
- Proceedings of 6th International Workshop on Chiral Dynamics — PoS(CD09), Journal Name: Proceedings of 6th International Workshop on Chiral Dynamics — PoS(CD09)
- Country of Publication:
- United States
- Language:
- English
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