  Dihadron beam spin asymmetries provide a wide range of insights into nucleon
structure and hadronization. Recent measurements at CLAS12 provide the first
empirical evidence of nonzero $G_1^\perp$, the parton helicity-dependent
dihadron fragmentation function (DiFF) encoding spin-momentum correlations in
hadronization. These measurements also allow for a point-by-point extraction of
the subleading-twist PDF $e(x)$ in a collinear framework. We observe different
behavior of the asymmetries in different invariant mass regions, motivating a
fully multidimensional study. The DiFFs also expand in terms of partial waves,
each corresponding to the interference of dihadrons of particular
polarizations. Altogether a fully multidimensional partial wave analysis is
needed, and this presentation will summarize the efforts and results obtained
thus far.
