The g2 Structure Function
Polarized structure functions at low $Q^2$ have the physical interpretation of (generalized) spin polarizabilities. At high $Q^2$, the polarized parton distribution $$g_2(x)$$ provides access to quark-gluon correlations in the nucleon. We discuss the interpretation of the $x^2$ moment of $$\bar{g}_2(x)$$ as an average transverse force on quarks in deep-inelastic scattering from a transversely polarized target. Qualitative connections with generalized parton distributions are emphasized. The $x^2$ moment of the chirally-odd twist-3 parton distribution $e(x)$ provides information on the dependence of the average transverse force on the transversity of the quark.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1018946
- Report Number(s):
- JLAB-THY-09-986; DOE/OR/23177-0724; arXiv:0905.4079; TRN: US1103507
- Journal Information:
- AIP Conf.Proc., Vol. 1155; Conference: International Workshop on Positrons at Jefferson Lab (JPOS 09), Newport News, Virginia, 25-27 Mar 2009.
- Country of Publication:
- United States
- Language:
- English
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