Detailed Balance and Sea-Quark Flavor Asymmetry of Proton

In 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., ū 6= d̄, is given as a pure statistical effect. It is found that d̄− ū ≈ 0.124, which is in surprisingly agreement with the experimental observation. PACS numbers: 12.40.Ee, 12.38.Lg, 14.20.Dh, 14.65.Bt Typeset using REVTEX [email protected] [email protected] Mailing address 1 The composition of hadrons in terms of the fundamental quark and gluon degrees of freedom is a central focus of hadronic physics. In the light-cone Fock state description of bound states [1], each physical hadron state is expended by a complete set of quark-gluon Fock states as