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Abstract:
We derive a new Paschos-Wolfenstein relationship which should bring an important correction to Weinberg angle sin2θ w when considering the quark-antiquark asymmetry in the nucleon sea.We also obtain the distributions of asymmetric strangeantistrange sea by using the light-cone meson-baryon fluctuation model with two kinds of wave functions,respectively.The most important issue is that the correction of asymmetric strange-antistrange sea can reduce approximately 30%-80% of the difference with three standard deviations between the measured value of the Weinberg angle sin2θ w by the NuTeV Collaboration and the predicted value by the standard model.References(5)
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