Variation of heavy quarkonium potential energy with quark separation at fixed chemical potential under different temperatures and at fixed temperature under different chemical potentials. (IMAGE)
Caption
When the quark separation is small, the potential energy is primarily influenced by the Coulomb potential, manifesting as negative values. As the quark separation increases, the potential gradually transitions to being dominated by the linear potential. The study reveals that with increasing system temperature and chemical potential, the linear component of the heavy quarkonium potential energy decreases. This phenomenon may be related to the tendency of heavy quarkonium to dissociate due to enhanced thermal motion, thereby reducing the length scale associated with the linear component of the potential. Meanwhile, the Coulomb potential component remains largely unaffected, indicating that short-range strong interactions remain stable even at elevated temperatures and chemical potentials.
Credit
Zhou Kai
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CC BY-NC