Speaker
Karl Slifer
(University of Virginia)
Description
We have measured the spin structure of the nucleon in the region
of the resonances (final state mass W <2 GeV) at intermediate
four-momentum transfer Q2 ~ 1.3 (GeV/c)2. Double-spin inclusive
asymmetries for longitudinally polarized 5.75 GeV electrons incident
on longitudinal and transverse solid polarized targets were measured
in Jefferson Lab's Hall C. Frozen ammonia and deuterated ammonia
were used as the polarized materials. The neutron spin structure is
extracted from the proton and deuteron asymmetries. We present
new results for the proton and deuteron spin asymmetries A1 and A2
and spin structure functions g1 and g2, and preliminary results for
the neutron asymmetries. Sum rules for the spin structure functions
(extended Gerasimov-Drell-Hearn, Burkhardt-Cottingham, third mo-
ments of g2-bar(x) = g2(x) - g_2^(twist-2) (x), Bjorken and Efremov-Leader-
Teryaev) have been calculated and are compared to theoretical pre-
dictions. These are the first measurements of the transverse proton
and deuteron spin structure in the resonances.
Primary author
Karl Slifer
(University of Virginia)
