  In order to make precision measurements of neutrino oscillations using
few-GeV neutrino beams a detailed understanding of nuclear effects in neutrino
scattering is essential. Recent studies have revealed that single-transverse
kinematic imbalance (STKI), defined in the plane transverse to an incoming
neutrino beam, can act as a unique probe of these nuclear effects. This work
first illustrates that an exclusive measurement of STKI at the off-axis near
detector of the T2K experiment (ND280) is expected distinguish the presence of
interactions with two nucleons producing two holes (2p-2h) from alterations of
the predominant underlying cross-section parameter ($M_A$ - the nucleon axial
mass). Such a measurement is then demonstrated with fake data, showing
substantial nuclear model separation potential.
