Exploring the spectrum of QCD using a space-time lattice

Abstract

Some past and ongoing explorations of the spectrum of QCD using Monte Carlo simulations on a space-time lattice are described. Glueball masses in the pure-gauge theory are reviewed, and the energies of gluonic excitations in the presence of a static quark-antiquark pair are discussed. Current efforts to compute the baryon spectrum using extended three-quark operators are also presented, emphasizing the need to use irreducible representations of the cubic point group to identify spin quantum numbers in the continuum limit.

Comments: 4 pages, 3 figures, talk presented at the International Conference on QCD and Hadronic Physics, Peking University, Beijing, China, Jun 16-20, 2005