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Determining the strange and antistrange quark distributions of the nucleon

The difference between the strange and antistrange quark distributions, $δs(x)=s(x)-\sbar(x)$, and the combination of light quark sea and strange quark sea, $Δ(x)=\dbar(x)+\ubar(x)-s(x)-\sbar(x)$, are originated from non-perturbative processes, and can be calculated using non-perturbative models of the nucleon. We report calculations of $δs(x)$ and $Δ(x)$ using the meson cloud model. Combining our calculations of $Δ(x)$ with relatively well known light antiquark distributions obtained from global analysis of available experimental data, we estimate the total strange sea distributions of the nucleon.