Gluon gravitational form factors of the proton in a light-front spectator model

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-05-08 DOI:10.1103/physrevd.111.094011

Amrita Sain, Poonam Choudhary, Bheemsehan Gurjar, Chandan Mondal, Dipankar Chakrabarti, Asmita Mukherjee

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引用次数: 0

Abstract

We calculate the gluon gravitational form factors (GFFs) of the proton using a light-front spectator model based on soft-wall anti–de Sitter (AdS)/quantum chromodynamics (QCD), where the active parton is a gluon. The model parameters are determined by fitting the unpolarized gluon distribution function to the 3.0nlo dataset. Subsequently, we predict the polarized gluon distribution, finding consistency with global analyses. Our predictions for the gluon GFFs show good agreement with recent lattice QCD simulations and experimental extractions. Using these gluon GFFs, we compute the contribution of the gluon to the proton mass and mechanical radii. We also analyze the gluonic contribution to the two-dimensional Galilean densities, including energy density, radial and tangential pressure, isotropic pressure, and pressure anisotropy of the proton.

Published by the American Physical Society

2025

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光前观模型中质子的胶子引力形式因子

我们使用基于软壁反德西特(AdS)/量子色动力学（QCD）的光前观察者模型计算质子的胶子引力形状因子（GFFs），其中活性部分是胶子。通过拟合3.0nlo数据集的非极化胶子分布函数来确定模型参数。随后，我们预测了极化胶子分布，发现与全局分析一致。我们对胶子gff的预测与最近的晶格QCD模拟和实验提取结果一致。利用这些胶子GFFs，我们计算了胶子对质子质量和机械半径的贡献。我们还分析了胶子对二维伽利略密度的贡献，包括质子的能量密度、径向和切向压力、各向同性压力和各向异性压力。2025年由美国物理学会出版

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

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.