Measurement of Double Longitudinal Spin Asymmetry, A$_{LL}$, for Inclusive $\pi^{0}$ Production at Forward Rapidity in PHENIX for $\sqrt{s}$=200 and 500 GeV

The Relativistic Heavy Ion Collider (RHIC) is the world's only source of polarized proton-proton collisions which provides access at leading order to $\Delta$ G(x), the gluon contribution to the proton spin. Previously, PHENIX has only been sensitive to truncated moments of $\Delta$ G over the limited Bjorken-x range of 0.05 $<$ x $<$ 0.2, leaving the low and high-x spin contributions unconstrained. While the $\Delta$ G(x)$\approx$ 0 scenario has not been ruled out by the data, the scenario with $\Delta$ G(x)$\ne$ 0 but with vanishing truncated moment, $\int_{0.05}^{0.2}G(x)dx=0$, due to a node in the functional form of $\Delta$ G(x), is also consistent with the data. With the successful commissioning of the Muon Piston Calorimeter (MPC) at forward rapidity, di-hadron measurements with hadrons at both forward and central rapidities are now possible in PHENIX. Two forward hadrons extend the kinematic coverage for gluons down to x$\sim10^{-3}$. Such an asymmetry measurement for di-hadrons and single hadrons at forward rapidity can be used to improve the constraints on $\Delta$ G(x) at small x. Here, we discuss the status of these measurements at forward rapidity in PHENIX using the MPC.