Overview of transverse spin physics in the PHENIX experiment
M. Boer, On behalf of the PHENIX collaboration
We present an overview of recent results from the PHENIX collaboration on spin physics using a transversely polarized proton beam. Several experiments have been conducted at RHIC in the past decade using such beam polarization in proton-proton collisions. Recently, polarized proton-nucleus collisions have also been studied. Important recent transverse spin measurements in PHENIX include the transverse spin asymmetry in light meson production ($\pi^0$ , $\eta$), where a non-zero asymmetry can be interpreted as an initial state interaction (related to the Sivers effect) or a final state correlation (partially related to the Collins effect). Transverse spin asymmetries have also been measured for muons from heavy flavored hadrons and J/$\Psi$. Some of these asymmetries have been measured in both proton-proton and proton-ion collision allowing the study of nuclear dependence.