  High precision measurements of the polarized electron beam-spin asymmetry in
semi-inclusive deep inelastic scattering (SIDIS) from the proton have been
performed using a 10.6~GeV incident electron beam and the CLAS12 spectrometer
at Jefferson Lab. We report here a high precision multidimensional study of
single $\pi^{+}$ SIDIS data over a large kinematic range in Bjorken x,
fractional energy and transverse momentum of the hadron as well as photon
virtualities $Q^{2}$ ranging from $1-7\,$GeV$^{2}$. In particular, the
structure function ratio $F^{\sin\phi}_{LU}/F_{UU}$ has been determined, where
$F^{\sin\phi}_{LU}$ is a twist-3 quantity that can reveal novel aspects of
emergent hadron mass and quark-gluon correlations within the nucleon. The
data's impact on the evolving understanding of the underlying reaction
mechanisms and their kinematic variation is explored using theoretical models
for the different contributing transverse momentum dependent parton
distribution functions.
