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arXiv 1104.5592hep-phhep-ex
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核子奇异夸克和反奇异夸克分布的确定

Determining the strange and antistrange quark distributions of the nucleon

Fu-Guang Cao, Hong Chen, A. I. Signal

摘要:

奇异夸克分布与反奇异夸克分布之间的差异$δs(x)=s(x)-\sbar(x)$和轻夸克海与奇异夸克海的组合$Δ(x)=\dbar(x)+\ubar(x)-s(x)-\sbar(x)$是由非微扰过程引起的,可以用核子的非微扰模型来计算。本文报道了用介子云模型计算$δs(x)$和$Δ(x)$的结果。结合我们对$Δ(x)$的计算和对现有实验数据的全面分析所得到的相对较好的轻反夸克分布,我们估计了核子的总奇异海分布。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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