Application of the Coupled Cluster Method to a Hamiltonian Lattice Field Theory
Loading...
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
The coupled cluster method has been applied to the eigenvalue problem lattice Hamiltonian QCD (without quarks) for SU(2) gauge fields in two space dimensions.
Using a recently presented new formulation and the truncation prescription of Guo et al. we were able to compute the ground state and the lowest $0^+$-glueball mass up to the sixth order of the coupled cluster expansion.
The results show evidence for a ``scaling window'' (i.e. good convergence and constance of dimensionless quantities) around $β=4/g^2 \approx 3$.
A comparison of our results to those of other methods is presented.
10 pages LaTeX 2.09, 4 postscript figures included as \special
10 pages LaTeX 2.09, 4 postscript figures included as \special