有限温度下\(\omega \)介子在全息QCD软壁模型中的同位旋对称性

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Narmin Nasibova
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引用次数: 0

摘要

通过同位旋关系将\(\rho \)介子-核子和\(\omega \)介子-核子的耦合常数联系起来。利用全息量子光盘的软壁模型,本研究旨在检验\(\omega \) -介子同位旋对称性的违反(如果有的话),以及\(\omega \) -介子- \(\Delta \)和\(\omega \) -介子-核子- \(\Delta \)重子耦合常数的温度依赖性。将向量场和费米子场的温度依赖剖面函数应用于模型中耦合常数的表达式,得到耦合常数的温度依赖关系。将5维AdS时空中矢量场与费米子场之间的最小相互作用和磁性相互作用包含在书面相互作用拉格朗日项中。研究了耦合常数\(g_{\omega N N}(T)\)、\(g_{\omega \Delta \Delta }(T)\)和\(g_{\omega N \Delta }(T)\)的温度依赖性。将\(g_{\omega NN}(T)\)与耦合常数\(g_{\rho NN}(T)\)进行比较,发现在有限温度下,\(\omega \)和\(\rho \)介子的同位旋对称性不被破坏。同时观察到\(\omega \)介子与重子的耦合常数随温度的升高而减小,在约束-非约束相变温度附近变为零。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Isospin Symmetry of \(\omega \) Meson at Finite Temperature in the Soft-Wall Model of Holographic QCD

The coupling constants of \(\rho \) meson-nucleon and \(\omega \) meson-nucleon are connected through the isospin relation. Using the soft-wall model of holographic QCD, the current work aims to examine the violation (if any) of isospin symmetry of the \(\omega \)-meson as well as the temperature dependency of the \(\omega \)-meson-\(\Delta \) and \(\omega \)-meson-nucleon-\(\Delta \) baryon coupling constants. Applying the temperature-dependent profile functions of the vector and fermion fields to the expression of the coupling constants in the model yields the temperature dependence of the coupling constants. The minimum and magnetic type interactions between vector and fermion fields in 5-dimensional AdS space-time are included in the written interaction Lagrangian terms. The temperature dependence of the coupling constants \(g_{\omega N N}(T)\), \(g_{\omega \Delta \Delta }(T)\), and \(g_{\omega N \Delta }(T)\) has been investigated. Comparing \(g_{\omega NN}(T)\) with the coupling constant \(g_{\rho NN}(T)\), it is found that the isospin symmetry of the \(\omega \) and \(\rho \) mesons is not violated at the finite temperature. It is also observed that the coupling constant of the \(\omega \) meson with baryons decreases as the temperature increases, and this coupling constant becomes zero near the confinement-deconfinement phase transition temperature.

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来源期刊
Few-Body Systems
Few-Body Systems 物理-物理:综合
CiteScore
2.90
自引率
18.80%
发文量
64
审稿时长
6-12 weeks
期刊介绍: The journal Few-Body Systems presents original research work – experimental, theoretical and computational – investigating the behavior of any classical or quantum system consisting of a small number of well-defined constituent structures. The focus is on the research methods, properties, and results characteristic of few-body systems. Examples of few-body systems range from few-quark states, light nuclear and hadronic systems; few-electron atomic systems and small molecules; and specific systems in condensed matter and surface physics (such as quantum dots and highly correlated trapped systems), up to and including large-scale celestial structures. Systems for which an equivalent one-body description is available or can be designed, and large systems for which specific many-body methods are needed are outside the scope of the journal. The journal is devoted to the publication of all aspects of few-body systems research and applications. While concentrating on few-body systems well-suited to rigorous solutions, the journal also encourages interdisciplinary contributions that foster common approaches and insights, introduce and benchmark the use of novel tools (e.g. machine learning) and develop relevant applications (e.g. few-body aspects in quantum technologies).
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