Doubly-heavy tetraquark at finite temperature in a holographic model

Xi Guo; Jia-Jie Jiang; Xuan Liu; Xun Chen; Dong Xiang; Xiao-Hua Li

doi:10.1140/epjc/s10052-024-12453-x

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2024) 84: 101
https://doi.org/10.1140/epjc/s10052-024-12453-x

Regular Article - Theoretical Physics

Doubly-heavy tetraquark at finite temperature in a holographic model

Xi Guo, Jia-Jie Jiang, Xuan Liu, Xun Chen^d, Dong Xiang^e and Xiao-Hua Li^f

School of Nuclear Science and Technology, University of South China, 421001, Hengyang, China

^d chenxunhep@qq.com
^e xiangdong@usc.edu.cn
^f lixiaohuaphysics@126.com

Received: 15 September 2023
Accepted: 16 January 2024
Published online: 30 January 2024

Abstract

In this paper, we employ gauge/gravity duality to investigate the string breaking and melting of doubly-heavy tetraquark that includes two heavy quarks and two light antiquarks in a holographic model at finite temperature. Firstly, four different configurations of $QQ \bar{q} \bar{q}$ ${{\textrm{QQ}}}\bar{{\textrm{q}}}\bar{{\textrm{q}}}$ are studied at different separation distances of the heavy quarks at finite temperatures. At high temperature, $QQ \bar{q} \bar{q}$ ${{\textrm{QQ}}}\bar{{\textrm{q}}}\bar{{\textrm{q}}}$ will melt at certain distances and the screening distance has been given for different temperatures. As the temperature continues to increase, some configurations of doubly-heavy tetraquark can not exist. Furthermore, we investigate three decay modes of $QQ \bar{q} \bar{q}$ ${{\textrm{QQ}}}\bar{{\textrm{q}}}\bar{{\textrm{q}}}$ and compare the potential energy of $QQ \bar{q} \bar{q}$ ${{\textrm{QQ}}}\bar{{\textrm{q}}}\bar{{\textrm{q}}}$ with that of $QQq$ ${\textrm{QQq}}$ at finite temperature.

© The Author(s) 2024

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.