A tetraquark or not a tetraquark: A holography inspired stringy hadron (HISH) perspective

Understand

We suggest to use the state $Y(4630)$, which decays predominantly to $\Lambda_c\bar\Lambda_c$, as a window to the landscape of tetraquarks.

• We propose a simple criterion to decide whether a state is a genuine stringy exotic hadron - a tetraquark - or a "molecule".
• If it is the former it should be on a (modified) Regge trajectory.
• We present the predictions of the mass and width of the higher excited states on the $Y(4630)$ trajectory.