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Signal, Fu-Guang Cao, Hong Chen","submitted_at":"2011-04-29T10:34:47Z","abstract_excerpt":"The difference between the strange and antistrange quark distributions, $\\delta s(x)=s(x)-\\sbar(x)$, and the combination of light quark sea and strange quark sea, $\\Delta (x)=\\dbar(x)+\\ubar(x)-s(x)-\\sbar(x)$, are originated from non-perturbative processes, and can be calculated using non-perturbative models of the nucleon. We report calculations of $\\delta s(x)$ and $\\Delta(x)$ using the meson cloud model. 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