Doubly-heavy tetraquark at finite temperature in a holographic model
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, we investigate four configurations of QQqq in the confined phase and consider different separation distances of the heavy quarks at varying temperatures. At high temperature, QQqq melts at certain distances and the confined quarks are released. As the temperature continues to increase, some configurations of doubly-heavy tetraquark can not exist. Furthermore, we investigate three decay modes of QQqq and compare the potential energy of QQqq with that of QQq at finite temperature .
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