Description
The Relativistic Heavy Ion Collider (RHIC) is a unique facility as it is the world’s only polarizedproton + proton collider capable of delivering highly polarized protons at√s= 200/500 GeV.Using longitudinally polarized protons, RHIC is able to probe the longitudinal spin structureof the proton throughW ALandW, jet, hadron, and di-jetALLmeasurements, providingconstraints on the sea quark and gluon polarization distributions. Furthermore, using transverslypolarized protons RHIC can probe the transvers spin structure of the proton such as transversity,the Collins fragmentation function, and the Sivers function, through W, jet, di-hardon, and IFFANandAUTmeasurements. Presented here is a brief summary of the recent results of the STARand PHENIX proton + proton data at RHIC, which are playing a key role in our understandingof the proton spin structure.
