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arXiv · hep-ph/0111183

Asymmetry of Strange Sea in Nucleons

Xue-Qian Li·Xiao-Bing Zhang·Bo-Qiang Ma
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Abstract

Based on the finite-temperature field theory, we evaluate the medium effects in 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 $δm\equiv Δm_s-Δm_{\bar s}$ where $Δm_{s(\bar s)}$ is the medium-induced mass of strange quark by a few KeV at most, but the long-distance effects by strong interaction are sizable. Our numerical results show that there exists an obvious mass difference between strange and anti-strange quarks, as large as 10-100 MeV.

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Xue-Qian Li, Xiao-Bing Zhang, Bo-Qiang Ma. 2001-11-15. Asymmetry of Strange Sea in Nucleons. https://doi.org/10.1103/physrevd.65.014003

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