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Friday, February 9, 2001
Physics Building, Room 204
Note special time.
[Host: Gordon Cates]
"Neutron Spin Structure Function Measurements at Jefferson Lab"
Spin structure functions provide basic information about the spin of the quark
distributions inside the nucleon. Measurements at high energy
provided precision spin structure function data at low values of xbj.
is little precision data at low and moderate values of momentum transfer
values of xbj . This is especially true for the neutron due to the
absence of a free
neutron target. Polarized ND3 , NH3 and 3He targets at Jefferson lab combined
with its high-polarization continuous electron beam have provided the opportunity
to make high precision neutron spin structure measurements in the high
As examples of high precision measurements possible at Jefferson lab, I
two planned neutron spin structure measurements, one in the deep
and the other in the resonance region, using the Hall A polarized 3He
deep inelastic measurement will provide the first precision test of
predictions for the
virtual photon asymmetry An1 in the valence quark region. The
measurement in the
resonance region, combined with the DIS measurement will provide a first
quark-hadron duality for spin structure of the neutron
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