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Title: The search for higher twist effects in the spin-structure functions of the neutron

Jefferson Lab experiment E97-103 measured the spin structure function gn2 from a Q^2 of 0.58 to 1.36 with a nearly constant x of 0.2. Combining this data with a fit to the world gn1 data, the size of higher twist contributions to gn2 can be extracted using the Wandzura-Wilczek relation. These higher twist contributions result from quark-gluon correlations and are expected to be larger as Q^2 decreases. This experiment was performed in Hall A with a longitudinally polarized electron beam and a high density polarized He-3 target. The physics motivation and an overview of the experiment will be presented.
Authors:
Publication Date:
OSTI Identifier:
900672
Report Number(s):
JLAB-PHY-02-172; DOE/ER/40150-4244
TRN: US0703561
DOE Contract Number:
AC05-84ER40150
Resource Type:
Conference
Resource Relation:
Conference: Workshop On Testing QCD Through Spin Observables In Nuclear Targets, 18-20 Apr 2002, Charlottesville, Virginia
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA
Sponsoring Org:
USDOE - Office of Energy Research (ER)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON BEAMS; NEUTRONS; PHYSICS; SPIN; STRUCTURE FUNCTIONS; TARGETS; TESTING; QUANTUM CHROMODYNAMICS