Thomas Jefferson National Accelerator Facility
Theory Center
Contact e-mail(s): dudek@jlab.org
Previous Studies:
Preprint:
- Charmonium excited state spectrum in lattice QCD: arXiv:0707.4162
Working with a large basis of covariant derivative-based meson interpolating fields we demonstrate the
feasibility of reliably extracting multiple excited states using a variational method. The study is performed on
quenched anisotropic lattices with clover quarks at the charm mass. We demonstrate how a knowledge of the
continuum limit of a lattice interpolating field can give additional spin-assignment information, even at a single
lattice spacing, via the overlap factors of interpolating field and state. Excited state masses are systematically
high with respect to quark potential model predictions and, where they exist, experimental states. We conclude
that this is most likely a result of the quenched approximation.
Recent Talks:
Recent Progress:
- Derivative based operators implemented into sequential source technology. Initial testing
indicates ground state three-point function results compatible with point-like operators.
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