The Dynamical Diquark Model: First Numerical Results

Understand

We produce the first numerical predictions of the dynamical diquark model of multiquark exotic hadrons.

• Using Born-Oppenheimer potentials calculated numerically on the lattice, we solve coupled and uncoupled systems of Schroedinger equations to obtain mass eigenvalues for multiplets of states that are, at this stage, degenerate in spin and isospin.
• Assuming reasonable values for these fine-structure splittings, we obtain a series of bands of exotic states with a common parity eigenvalue that agree well with the experimentally observed charmoniumlike states, and we predict a number of other unobserved states.
• In particular, the most suitable fit to known pentaquark states predicts states below the charmonium-plus-nucleon threshold.