Inverse Excitation Hierarchy in Doubly-Heavy Tetraquarks within the Diquark Model

Maximilian Weber, Daiki Suenaga, Masayasu Harada

We investigate the $T_{cc}$ tetraquark, treating it as a bound state of a heavy diquark and a light antidiquark. Using the Silvestre-Brac potential and solving the Schrödinger equa…