Nuclear shadowing in deep inelastic scattering on nuclei at very small x
Nuclear shadowing in deep inelastic scattering on nuclei at very small
x
复制标题
非常小的 x 时原子核上深度非弹性散射中的核阴影
DOI：
10.1103/physrevd.102.036021
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发表时间：
2020
影响因子：
5
通讯作者：
B. Mangazeev
中科院分区：
文献类型：
--
作者：
E. Bugaev;B. Mangazeev
在非常小的Bjorken x值和小的Q^2值（Q^2<5 Gev^2）下，计算了对中等质量核深部非弹性散射结构函数的核阴影修正。本文采用作者在以前的工作中发展起来的描述核子深度非弹性散射结构函数的两分量方法。它示出的核子结构函数的硬分量，所产生的，在色偶极模型，从qq-对具有高的横向动量，几乎没有阴影。结果表明，当x值较小时，随着x的减小，阴影曲线斜率的变化取决于硬分量对核子结构函数的相对贡献（该贡献是x和Q^2的函数）和胶子饱和效应的大小。结果表明，考虑饱和效应对于预测x<10^-4时的阴影效应是必不可少的，这取决于Q^2的值。几个核的核阴影的数值计算结果进行了比较，与现有的数据的E665和NMC合作。
Nuclear shadowing corrections to the structure functions of deep inelastic scattering on intermediate-mass nuclei are calculated at very small values of Bjorken x and small values of Q^2 (Q^2<5 Gev^2). The two-component approach developed in previous works of authors for a description of the nucleon structure functions of deep inelastic scattering is used. It is shown that the hard component of the nucleon structure functions that arises, in terms of the colour dipole model, from qq-pairs with a high transverse momentum, is almost not shadowed. It is shown that a change of the slope of the shadowing curve with a decrease of x depends, at small values of x, on the relative contribution of the hard component to the nucleon structure function (this contribution is a function of x and Q^2) and on a size of gluon saturation effects. It is shown that an accounting for saturation effects becomes essential for predictions of shadowing at x<10^-4, depending on a value of Q^2. Results of numerical calculations of nuclear shadowing for several nuclei are compared with available data of the E665 and the NMC collaborations.
影响因子：
5
作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
通讯作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli