Tuesday, October 9, 2012

1210.1953 (Zachary S. Brown et al.)

Tetraquark bound states in the heavy-light heavy-light system    [PDF]

Zachary S. Brown, Kostas Orginos
A calculation of the interaction potential of two heavy-light mesons in lattice QCD is used to study the existence of tetraquark bound states. The interaction potential of the tetraquark system is calculated on the lattice with 2+1 flavours of dynamical fermions with lattice interpolating fields constructed using \emph{colorwave} propagators. These propagators provide a new method for constructing all-to-all spatially smeared the interpolating fields, a technique which allows for a better overlap with the ground state wavefunction as well as reduced statistical noise. Potentials are extracted for 24 distinct channels, and are fit with a phenomenological non-relativistic quark model potential, from which a determination of the existence of bound states is made via numerical solution of the two body radial Schr\"odinger equation.
View original: http://arxiv.org/abs/1210.1953

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