Asymmetry of the strange sea in nucleons
Asymmetry of the strange sea in nucleons
Based on finite-temperature field theory, we evaluate medium effects in the nucleon, which can induce an asymmetry between quarks and antiquarks of the strange sea. The short-distance effects determined by the weak interaction can give rise to $\ensuremath{\delta}m\ensuremath{\equiv}\ensuremath{\Delta}{m}_{s}\ensuremath{-}\ensuremath{\Delta}{m}_{\overline{s}}$ where $\ensuremath{\Delta}{m}_{s(\overline{s})}$ is the medium-induced mass of the strange quark of a …