Correction of Asymmetric Quark-Antiquark Strange Sea to Weinberg Angle

DING Yong; LU Zhun; MA Bo-Qiang

Chinese Physics C> 2004, Vol. 28> Issue(9) : 947-951

Correction of Asymmetric Quark-Antiquark Strange Sea to Weinberg Angle

School of Physics,Peking University,Beijing 100871,China

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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

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DING Yong, LU Zhun and MA Bo-Qiang. Correction of Asymmetric Quark-Antiquark Strange Sea to Weinberg Angle[J]. Chinese Physics C, 2004, 28(9): 947-951.

DING Yong, LU Zhun and MA Bo-Qiang. Correction of Asymmetric Quark-Antiquark Strange Sea to Weinberg Angle[J]. Chinese Physics C, 2004, 28(9): 947-951. shu

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Received: 2004-02-25
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Correction of Asymmetric Quark-Antiquark Strange Sea to Weinberg Angle

Corresponding author: DING Yong,

School of Physics,Peking University,Beijing 100871,China

Received Date: 2004-02-25

Accepted Date: 1900-01-01

Available Online: 2004-09-05

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.

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Correction of Asymmetric Quark-Antiquark Strange Sea to Weinberg Angle

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