Polarized full‑angle deep‑electron‑scattering and direction‑selectivity of anti‑nucleon‑nucleon annihilation: experimental supporting schemes for the Charge‑Cluster Theory (CCTH)

The internal structure of nucleons remains an unsolved fundamental problem in modern physics. Mainstream descriptions rely on the quark‑parton model and quantum‑chromodynamic phenomenological fitting, extracting distribution functions from collision‑cross‑section data, whereas the spatial charge arrangement and underlying dynamics inside nucleons remain a black box. The Charge‑Cluster Theory (CCTH) takes positive‑negative charge packets (electrons‑positrons) as fundamental physical units, with Coulomb‑static and magnetic‑dipole couplings as the sole microscopic dynamical sources. Protons and neutrons are interpreted as structured clusters bound by charge‑packets. Various hadronic resonances produced in high‑energy collisions are transient intermediate structures of local fragments generated after energy release from annihilation and their step‑by‑step decay‑evolution; all reaction chains finally converge backwards to free positive‑negative electrons and gamma‑photons. Based on the previously‑published Coulomb‑magnetic‑dipole configuration‑dynamics for electron‑positron annihilation, this paper proposes two experimental schemes to directly test nucleon charge‑cluster configurations: (1) polarized full‑angle deep‑electron‑scattering experiments, which simultaneously tune incident‑electron polarization, nucleon‑target polarization and scattering azimuthal angles, expecting structured features in polarization‑asymmetry parameters and angular‑dependent cross‑sections originating from internal cluster‑geometry; (2) angle‑resolved annihilation experiments for four anti‑nucleon‑nucleon pairs (\(p\bar p\), \(p\bar n\), \(n\bar p\), \(n\bar n\)). After subtracting Coulomb‑attraction, annihilation behaviours of the four pairs are broadly similar. Only homo‑anti‑pairs (\(p\bar p\), \(n\bar n\)) possess optimal annihilation channels under strict head‑on axial incidence, which are low‑probability events. Annihilation proceeds via mutual‑interpenetration‑interlocking of clusters, releasing small amounts of electron‑positron pairs accompanied by fragment‑stepwise‑evolution, consistent with local‑fragment‑evolution behaviours in high‑energy collision‑showers. Within this framework, only electrons‑positrons and photons serve as underlying energy‑packets, and electromagnetic interaction is the unique fundamental force; conventional neutrinos defined by the standard‑model are not admitted. Distinguishable falsification criteria against the parton‑model are provided, delivering implementable experimental test routes for Charge‑Cluster Theory.