Nonlinear corrections for the nuclear gluon distribution in eA processes

IF 3.6 2区物理与天体物理 Q1 PHYSICS, NUCLEAR

中国物理C Pub Date : 2024-03-01 DOI:10.1088/1674-1137/ad1cdb

G.R. Boroun, B. Rezaei, F. Abdi

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引用次数: 0

Abstract

An analytical study with respect to the nonlinear corrections for the nuclear gluon distribution function in the next-to-leading order approximation at small x is presented. We consider the nonlinear corrections to the nuclear gluon distribution functions at low values of x and

using the parametrization

and the nuclear modification factors obtained from the Khanpour-Soleymaninia-Atashbar-Spiesberger-Guzey model. The CT18 gluon distribution is used for the baseline proton gluon density at

. We discuss the behavior of the gluon densities in the next-to-leading order and the next-to-next-to-leading order approximations at the initial scale

, as well as the modifications due to the nonlinear corrections. We find that the QCD nonlinear corrections are more significant for the next-to-leading order accuracy than the next-to-next-to-leading order for light and heavy nuclei. The results of the nonlinear GLR-MQ evolution equation are similar to those obtained with the Rausch-Guzey-Klasen gluon upward and downward evolutions within the uncertainties. The magnitude of the gluon distribution with the nonlinear corrections increases with a decrease in x and an increase in atomic number A.

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eA 过程中核胶子分布的非线性修正

本文介绍了对小 x 值下次导阶近似核胶子分布函数非线性修正的分析研究。我们考虑了低 x 值时核胶子分布函数的非线性修正，并使用了从 Khanpour-Soleymaninia-Atashbar-Spiesberger-Guzey 模型获得的参数化和核修正因子。我们使用 CT18 胶子分布来计算基线质子胶子密度。我们讨论了胶子密度在初始尺度下的次领先阶近似和次领先阶近似的行为，以及非线性修正引起的变化。我们发现，对于轻核和重核而言，QCD 非线性修正对于次导阶精度的影响比次邻导阶更大。非线性 GLR-MQ 演变方程的结果与劳施-古泽-克拉斯恩胶子向上和向下演化方程的结果相似，都在不确定范围之内。随着 x 的减小和原子序数 A 的增大，非线性修正的胶子分布幅度也随之增大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

中国物理C 物理-物理：核物理

CiteScore

6.50

自引率

8.30%

发文量

8976

审稿时长

1.3 months

期刊介绍： Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of: Particle physics; Nuclear physics; Particle and nuclear astrophysics; Cosmology; Accelerator physics. The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication. The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal. The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.