  One of the primary goals of the STAR spin program is to determine the
contribution of the gluon spin ($\Delta G$) to that of the proton. Recent
measurements of the longitudinal double-helicity asymmetry, $A_{LL}$, from
inclusive jets place strong constraints on the spin-dependent gluon
distribution $\Delta g(x)$ and, for the first time, find evidence for non-zero
gluon polarization values for partonic momentum fraction $x$ greater than 0.05.
In contrast to inclusive jets, di-jet correlation measurements provide access
to partonic kinematics, at leading order, and thus give tighter constraints on
the behavior of $\Delta g$ as a function of gluon momentum fraction.
Furthermore, di-jet measurements at forward rapidity probe the lower $x$ values
where $\Delta g(x)$ is poorly constrained. Preliminary $A_{LL}$ results for
di-jets with $-0.8 < \eta_1 < 0.8$ and $0.8 < \eta_2 < 1.8$, from polarized
$pp$ collisions at $\sqrt{s}$ = 200 GeV, are presented.

High Energy Physics - Experiment