2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207560In this study, the proton is taken as an ensemble of quark-gluon Fock states. Using the principle of detailed balance, the probabilities of finding every Fock states of the proton are obtained without any parameter. A new origin of the light flavor sea quark asymmetry, i.e., $\bar{u} \not= \bar{d}$, is given as a pure statistical effect. It is found that $\bar{d}-\bar{u} \approx 0.124$, which is in surprisingly agreement with the experimental observation.significant changes in title and content, 12 latex pages, to appear in PLBHigh Energy Physics - PhenomenologyHigh Energy Physics - ExperimentNuclear ExperimentNuclear Theorytext