A variational fit to the lattice energy of two heavy-light mesons
arXiv:hep-ph/9902249 · doi:10.1103/PhysRevD.61.014014
Abstract
Recent lattice calculations on the interaction energy of two heavy-light mesons (Q^2\bar{q}^2) are interpreted in terms of the potential of the corresponding single heavy-light meson (Q\bar{q}). This model leads to a large overestimate of the binding compared with the lattice data -- unless the basic Q\bar{q} potential is modified to become a four-quark potential.
17 pages, 2 eps figures. Considerably revised version accepted for publication