ud(b)over-bar (b)over-bar tetraquark resonances with lattice QCD potentials and the Born-Oppenheimer approximation

We study tetraquark resonances with lattice QCD potentials computed for a static (b) over bar(b) over bar pair in the presence of two lighter quarks ud, the Born-Oppenheimer approximation and the emergent wave method. As a proof of concept we focus on the system with isospin I = 0, but consider different relative angular momenta l of the heavy quarks (b) over bar(b) over bar For l = 0 a bound state has already been predicted with quantum numbers I(J(P)) = 0(1(+)) Exploring various angular momenta we nowcompute the phase shifts and search for S and T matrix poles in the second Riemann sheet. We predict a tetraquark resonance for l = 1, decaying into two B mesons, with quantum numbers II(J(P)) = 0(1(+)), mass m = 10576(-4)(+4) MeV and decay width Gamma = 112(-103)(+90) MeV.