Calculation of the nucleon F 2 structure function for a quark-diquark distribution using the meson cloud model in a light-cone frame
Calculation of the nucleon F 2 structure function for a quark-diquark distribution using the meson cloud model in a light-cone frame
复制标题
使用光锥框架中的介子云模型计算夸克-双夸克分布的核子 F 2 结构函数
DOI：
10.1103/physrevc.58.3641
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发表时间：
1998
影响因子：
3.1
通讯作者：
F. Zamani
中科院分区：
文献类型：
--
作者：
F. Zamani
我们计算了质子和中子的夸克分布函数和结构函数。计算是在光锥框架内进行的。所修饰的核子被假定为重子-介子对的裸核子加虚拟光锥Fock态的叠加。假设裸核子由一个双夸克和一个夸克组成。初始分布是演化的。根据演化分布计算出的结构函数与NMC的结果进行了比较。此外，计算并观察到违反了戈特弗里德和规则。然而，破坏的程度比观测到的要小，这表明介子云模型并不是戈特弗里德和规则破坏的唯一来源。
We calculate quark distribution functions and ${F}_{2}$ structure functions for protons and neutrons. The calculation is performed in the light-cone frame. The dressed nucleon is assumed to be a superposition of the bare nucleon plus virtual light-cone Fock states of baryon-meson pairs. The bare nucleon is assumed to be composed of a diquark and a quark. The initial distributions are evolved. The ${F}_{2}$ structure functions calculated from the evolved distributions are compared with NMC results. Also, the Gottfried sum rule is calculated and observed to be violated. However, the degree of violation is smaller than observation, an indication that the meson cloud model is not the only source of contribution to the Gottfried sum-rule violation.