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High precision measurements of the polarized electron beam-spin asymmetry insemi-inclusive deep inelastic scattering (SIDIS) from the proton have beenperformed using a 10.6~GeV incident electron beam and the CLAS12 spectrometerat Jefferson Lab. We report here a high precision multidimensional study ofsingle $\pi^{+}$ SIDIS data over a large kinematic range in Bjorken x,fractional energy and transverse momentum of the hadron as well as photonvirtualities $Q^{2}$ ranging from $1-7\,$GeV$^{2}$. In particular, thestructure 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 ofemergent hadron mass and quark-gluon correlations within the nucleon. Thedata's impact on the evolving understanding of the underlying reactionmechanisms and their kinematic variation is explored using theoretical modelsfor the different contributing transverse momentum dependent partondistribution functions.

physical review letters

Multidimensional, high precision measurements of beam single spin  asymmetries in semi-inclusive $\pi^{+}$ electroproduction off protons in the  valence region