Title

Radial Excited States for Heavy Quark Systems in NRQCD

Author(s)/Creator(s)

Simon Catterall, Syracuse UniversityFollow
F. R. Devlin, University of Cambridge
I. T. Drummond, University of Cambridge
R. R. Hogan, University of Cambridge

Document Type

Article

Date

11-4-1993

Language

English

Disciplines

Physics

Description/Abstract

Following the Non-Relativistic QCD approach we use a gauge invariant smearing method with factorization to measure the excitation energies for a heavy Q\bar{Q} system on a 24^3\times 48 lattice at \beta=6.2. The results come from averaging over an ensemble of 60 QCD configurations. In order to enhance the signal from each configuration we use wall sources for quark propagators. The quark Hamiltonian contains only the simplest non-relativistic kinetic energy term. The results are listed for a range of bare quark masses. The mass splittings are insensitive to this variable though there are a slight trends with increasing quark mass. For an appropriate choice of UV cut-off (a^{-1}=3.2Gev) the mass spectrum compares reasonably well with the experimental values for the spin-averaged energy gaps of the \Upsilon system. We also present results for the DE and DT waves for the lowest bare quark mass. The results are consistent with degeneracy between the two types of D wave. This encourages the idea that even with our simple quark Hamiltonian the departure from rotational invariance is not great.

Additional Information

12 pages More information at http://arxiv.org/abs/hep-lat/9311006

Recommended Citation

Catterall, Simon; Devlin, F. R.; Drummond, I. T.; and Hogan, R. R., "Radial Excited States for Heavy Quark Systems in NRQCD" (1993). Physics - All Scholarship. 497.
https://surface.syr.edu/phy/497

Source

Harvested from Arxiv.org

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.