Effective Field Theories and Lattice QCD for the X Y Z frontier

Understand

Exotic states have been predicted before and after the advent of QCD.

• In the last decades they have been observed at accelerator experiments in the sector with two heavy quarks, at or above the quarkonium strong decay threshold and called X Y Z states.
• These states offer a unique possibility for investigating the dynamical properties of strongly correlated systems in QCD.
• I will show how an alliance of nonrelativistic effective field theories and lattice can allow us to address these states in QCD.