Holographic QCD running coupling for heavy quarks in strong magnetic field

IF 4.8 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2025-10-19 DOI:10.1140/epjc/s10052-025-14885-5

Irina Ya. Aref’eva, Ali Hajilou, Alexander Nikolaev, Pavel Slepov

引用次数: 0

Abstract

We investigate the influence of a magnetic field on the running coupling constant for a heavy-quark model in a bottom-up holographic approach. To achieve this, we employ a magnetized Einstein–Maxwell–Dilaton background that captures the essential features of heavy quark dynamics. Similar to the light-quark model, the running coupling \(\alpha \) for heavy quarks decreases in the presence of a strong external magnetic field at fixed temperature and chemical potential. The key distinction between the light and heavy quark models lies in the locations of their respective phase transitions. However, near the 1st order phase transitions, the behavior of \(\alpha \) is analogous for both cases: \(\alpha \) exhibits jumps that depend on temperature, chemical potential, and magnetic field strength.

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强磁场中重夸克全息QCD运行耦合

我们用自底向上的全息方法研究了磁场对重夸克模型运行耦合常数的影响。为此，我们采用磁化的爱因斯坦-麦克斯韦- dilaton背景，捕捉重夸克动力学的基本特征。与轻夸克模型类似，在固定温度和化学势下，强外磁场存在时，重夸克的运行耦合\(\alpha \)减小。轻夸克模型和重夸克模型的关键区别在于它们各自相变的位置。然而，在一阶相变附近，\(\alpha \)的行为对这两种情况是相似的：\(\alpha \)表现出依赖于温度、化学势和磁场强度的跳跃。

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

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.