Refined lattice/model investigation of $u d \bar{b} \bar{b}$ tetraquark candidates with heavy spin effects taken into account

Understand

We investigate four-quark systems consisting of two heavy anti-bottom quarks and two light up/down quarks.

• We propose to solve a coupled Schr\"odinger equation for the anti-bottom-anti-bottom separation using potentials computed via lattice QCD in the limit of static anti-bottom quarks.
• This coupled Schr\"odinger equation allows to incorporate effects due to the heavy anti-bottom spins.
• First exploratory numerical tests are discussed.