Di-jet Measurements at Mid and Intermediate Rapidities $(-0.8 < \eta < 1.8)$ at the STAR Detector

One of the primary goals of the STAR spin program is to determine the spin-dependent gluon distribution, $\Delta g(x)$, of the proton. To date, the strongest constraints on $\Delta g(x)$ from STAR have come from measurements of the longitudinal double-spin asymmetry, $A_{LL}$, in inclusive jet production. In contrast to inclusive jets, di-jet correlation measurements provide access to partonic kinematics, at leading order, and thus give better constraints on the behavior of $\Delta g(x)$ as a function of partonic momentum fraction $x$. Furthermore, di-jet measurements at larger rapidity sample lower $x$ values where $\Delta g(x)$ is poorly constrained. In addition to $A_{LL}$, the di-jet cross section can be measured and compared to NLO pQCD calculations to confirm that detector and reconstruction effects are well understood. The mid-rapidity di-jet cross section result, utilizing 17 pb$^{-1}$ of 57\% polarized p-p data at $\sqrt{s} = 200$ GeV collected in 2009, will be presented. The status of the cross section and $A_{LL}$ measurements at forward rapidities will also be discussed.