Exotic hybrid pseudopotentials at finite temperature and chemical potential  

作　　者：Le Zhang Fei-Yang Cai Xun Chen 张乐;蔡飞扬;陈勋(College of Physics and Electronic Science,Hubei Normal University,Huangshi 435002,China)

机构地区：[1]College of Physics and Electronic Science,Hubei Normal University,Huangshi 435002,China

出　　处：《Chinese Physics C》2025年第1期186-194,共9页中国物理C(英文版)

基　　金：Supported by the National Natural Science Foundation of China(12405154,12005056)。

摘　　要：Using gauge/gravity duality,we studied the exotic hybrid pseudopotentials at finite temperature and chemical potential.The Σ hybrid meson can be described by a model including an object called"defect"on a string linking the quark and antiquark.The Σ_(u)^(-) hybrid potential at zero temperature and chemical potential was first proposed by Andreev and is perfectly described.In this study,we extended the aforementioned model to finite chemical potential and compared the separate distance and pseudopotentials of Σ_(g)^(+) and Σ_(u)^(-).Unlike the Σ_(g)^(+) ground state,the Σ_(u)^(-),hybrid pseudopotentials no longer exhibit Coulomb-like behavior at short distances.In addition,temperature and chemical potential have a significant impact on the Σ_(u)^(-) hybrid pseudopotentials.The screen distances and hybrid pseudopotentials of Σ_(u)^(-) significantly decrease when increasing temperature and chemical potential.We represented the melting diagram of Σ_(g)^(+) and Σ_(u)^(-) in the T-μ plane and confirmed that the quark-antiquark pair in Σ_(u)^(-) excited state is easier to melt than that in Σ_(g)^(+) ground state.

关 键 词：holographic QCD hybrid potential heavy quark 

分 类 号：O572.33[理学—粒子物理与原子核物理]