Dependence of Forward $\pi^{0}$ Transverse Single Spin Asymmetries on Roman Pot Triggers from $\sqrt{s}=200$ GeV $pp$ Collisions at STAR

Surprisingly substantial transverse single spin asymmetries, $A_N$, have been observed in many hadronic channels since 1976. Since then, many attempts have been made to explain the underlying mechanism, such as the Sivers effect, Collins effect, and twist-3 contributions; however, no explanation has been fully sufficient. Diffractive contributions to the cross-section may provide additional insight to the origin of the large $A_{N}$. In the most recent RHIC run of $pp$ collisions, the Forward Meson Spectrometer, an electromagnetic calorimeter covering a forward pseudorapidity range of $2.6<\eta<4$, recorded a substantial data set mostly composed of $\pi^{0}$s from which $A_{N}$ can be extracted. Furthermore, STAR installed Roman Pot silicon trackers to tag diffractive events through forward going protons. Correlations of $\pi^{0}$ events with Roman Pot triggers will for the first time address the role of the diffractive contributions to $A_{N}$. The status of the analysis of such correlations will be presented.