Di-hadron correlations in $e^-$A DIS with CLAS

We present a measurement of the nuclear dependence of di-hadron production in deep inelastic scattering off nuclei using the CLAS detector at Jefferson Lab. We report results on the di-hadron correlation functions (that is, the probability of detecting a second hadron given the detection of the first) for charged pions using deuterium, carbon, iron, and lead data.  By making separate measurements for each target type, the results complement earlier measurements of nuclear-to-deuterium ratios for single- and/or di-hadron yields, and may help constrain models of interactions between hadrons and the nuclear medium.   We report the first measurement of azimuthal and rapidity correlations in nuclear DIS, which shows a strong suppression for back-to-back pion pairs in nuclei, whereas we observe an enhancement for such pairs where the azimuthal and rapidity separations are both small.  This represents a new type of study in electron-nucleus collisions and serves as a pathfinder for future experiments with CLAS12 and the Electron-Ion Collider.