Studying the flavor dependence of TMD fracture functions with CLAS12

We report the first measurements studying the flavor dependence of the double semi-inclusive deep inelastic scattering process, where one hadron is detected in the current-fragmentation region (CFR) and another in the target-fragmentation region (TFR). Observed non-zero $\sin \Delta \phi$ modulations, where $\Delta \phi$ is the difference of azimuthal angles of the hadrons, indicate that long range correlations exist between the spin and transverse momenta of hadrons produced simultaneously in the CFR and TFR and allow access to a leading-twist transverse-momentum-dependent fracture function describing longitudinally polarized quarks in an unpolarized nucleus. The data were taken with a 11~GeV longitudinally polarized electron beam incident on unpolarized liquid hydrogen and deuterium targets using the CLAS12~Spectrometer at Jefferson Lab. These data represent a significant extension over the first CLAS12 results, which were limited to the $ep \rightarrow e'p\pi^+X$ process. We now incorporate a factor of two times more proton target statistics, compare results for proton and deuterium targets in order to study the flavor dependence of fracture functions for the first time and include both $\pi^+$ and $\pi^-$ final state CFR hadrons in order to test the universality of the formalism and cross-check the results with separate channels that may be subject to different systematics.