Speaker
Description
QCD Confinement precludes experiments from resolving colored quarks in order to understand the strong forces between them, however, polarized DIS experiments uniquely provide a clean measurement of observables used in determining an average color Lorentz force on the struck quark. Within the operator product expansion framework, the twist-3 matrix element, dp2 =Rx2(2g1+3g2)dx, is proportional to the average color Lorentz force on the quark (moving in the infinite momentum frame) the instant after being struck by a virtual photon. The Spin Asymmetries of the Nucleon Experiment (SANE) measured the proton’s polarized spin structure functions g1 and g2 in a range of Bjorken x, 0.3 < x < 0.8, where the dp2 integral is most sensitive. The data was taken from Q2 equal to 2.5GeV 2 up to 6.5GeV 2 allowing for the Q2 dependence of dp2 to be studied. In addition to presenting the latest results on spin structure functions, we will discuss the physics impact and extraction of dp2.
