A precise measurement of the g2 structure function of the deuteron
PAUL DEPIETRO, American University E155X COLLABORATION

The deep-inelastic polarized structure function g_2^d has been measured
at SLAC using 29.2 and 32.3 GeV longitudinally polarized (85%) electrons
incident on a transversely polarized (approx. 25%) lithium deuteride
target. The scattered electrons were detected in three spectrometers placed 
at 2.75, 5.5, and 10.5 degrees with respect to the incident beam direction. 
This corresponds to average momentum transfers Q^2 of 2, 5, and 12 GeV^2, 
respectively. Errors on g_2^d have been reduced by a factor of three compared
to the previously existing world data set, enabling us to make a distinction 
between various predictions for g_2^d. Using this data along with the E155X
g_2^p data, the corresponding structure function g_2^n can be extracted.