Polarized Nucleon Structure Functions within a Chiral Soliton Model
Polarized Nucleon Structure Functions within a Chiral Soliton Model
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DOI：
10.1103/physrevd.55.6910
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发表时间：
1996-09
影响因子：
5
通讯作者：
H. Weigel;L. Gamberg;H. Reinhardt
中科院分区：
文献类型：
--
作者：
H. Weigel;L. Gamberg;H. Reinhardt
我们在玻色子化的Nambu{endash}Jona-Lasinio模型中研究了核子作为手性孤子出现的极化自旋结构函数。给出了极电位散射的电磁极化结构函数g{sub 1}(x)和g{sub 2}(x)，并讨论了价夸克近似中的各种求和规则。这个近似是合理的，因为在这个模型中核子的轴向性质是由它们的价夸克贡献决定的。我们发现这些结构函数在0{le}x{le}1区间内是很好的定域。从NJL模型的尺度特征到数据的尺度特征，将模型对极化结构函数的预测与E143实验数据进行了比较。此外，在与模型计算相适应的动量尺度上与参数化数据进行了比较。{版权所有}{ital 1997} {ital美国物理学会}
We study polarized-spin structure functions of the nucleon within the bosonized Nambu{endash}Jona-Lasinio model where the nucleon emerges as a chiral soliton. We present the electromagnetic polarized structure functions g{sub 1}(x) and g{sub 2}(x) for ep scattering and discuss various sum rules in the valence quark approximation. This approximation is justified because in this model axial properties of the nucleon are dominated by their valence quark contributions. We find that these structure functions are well localized in the interval 0{le}x{le}1. We compare the model predictions on the polarized structure functions with data from the E143 experiment by evolving them from the scale characteristic of the NJL model to the scale of the data. Additionally, a comparison is made with parametrized data at a momentum scale commensurate with the model calculation. {copyright} {ital 1997} {ital The American Physical Society}