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arXiv 0909.0454nucl-thhep-exhep-phnucl-exphysics.data-an
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统计模型中的核EMC效应

Nuclear EMC Effect in a Statistical Model

Yunhua Zhang, Lijing Shao, Bo-Qiang Ma

备注：
26 latex pages, 3 figures
发表信息：
Nucl.Phys.A828:390-400,2009
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摘要：

本文用一个简单的统计模型来解释我们以前为计算核子的部分子分布函数而建立的$x \in [0.2,~0.7]$范围内的核EMC效应。在这里，我们把温度$T$作为原子序数$A$的参数，得到了与实验数据相符合的合理结果。结果表明，$A$越大，$T$越小，$V$体积越大，这些特征与其它模型一致。此外，我们还以铁为例，给出了夸克分布比\emph{i.e.}、$q^A(x) / q^D(x)$、$\bar{q}^A(x) / \bar{q}^D(x)$和$s^A(x) / s^D(x)$以及胶子比$g^A(x) / g^D(x)$的预言.这些预言与其他模型的预言不同，因此旨在测量反夸克、奇异夸克和胶子的部分子比的实验可以提供对不同模型的区分。

英文摘要：

A simple statistical model in terms of light-front kinematic variables is used to explain the nuclear EMC effect in the range $x \in [0.2,~0.7]$, which was constructed by us previously to calculate the parton distribution functions (PDFs) of the nucleon. Here, we treat the temperature $T$ as a parameter of the atomic number $A$, and get reasonable results in agreement with the experimental data. Our results show that the larger $A$, the lower $T$ thus the bigger volume $V$, and these features are consistent with other models. Moreover, we give the predictions of the quark distribution ratios, \emph{i.e.}, $q^A(x) / q^D(x)$, $\bar{q}^A(x) / \bar{q}^D(x)$, and $s^A(x) / s^D(x)$, and also the gluon ratio $g^A(x) / g^D(x)$ for iron as an example. The predictions are different from those by other models, thus experiments aiming at measuring the parton ratios of antiquarks, strange quarks, and gluons can provide a discrimination of different models.

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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