2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201464A possible way for the consistent probability interpretation of the Klein-Gordon equation is proposed. It is assumed that some states of a scalar charged particle cannot be physically realized. The rest of quantum states are proven to have positive-definite probability distributions.10 pagesHigh Energy Physics - TheoryMathematical PhysicsQuantum Physicstext