Probing Proton Hadron Pairs at Jefferson Lab

Dihadron studies of semi-inclusive deep inelastic scattering (SIDIS) of electrons off nucleons have been the subject of thorough theoretical and experimental investigations during the last decade. Spin-orbit correlations between target and current fragments can be tested by studying back-to-back target fragmentation and current fragmentation hadrons in coincidence. Such measurements on target-fragmentation h+ were performed with the clas12 detector in Hall B at Jefferson Laboratory. Building upon prior preliminary research into the non-zero single spin asymmetries of these reactions, for the first time, the Ring Imaging Cherenkov detector (RICH) has been used in analysis of ep -> e'p'h+X channels (where h+ is any positively charged hadron) to differentiate between particles. Using this new detector, analysis was conducted of the single spin asymmetries of the ep->e'p'h+X channels including the sin(delta-phi) modulations, where delta-phi is the difference between the proton and hadron azimuthal angles. Multidimensional analysis of these channels will be investigated further.