Heavy-quarkonium potential with input from lattice gauge theory
Abstract
In this dissertation we study potential models incorporating a nonperturbative propagator obtained from lattice simulations of a pure gauge theory. Initially we review general aspects of gauge theories, the principles of the lattice formulation of quantum chromodynamics (QCD) and some properties of heavy quarkonia, i.e. bound states of a heavy quark and its antiquark. As an illustration of Monte Carlo simulations of lattice models, we present applications in the case of the harmonic oscillator and SU(2) gauge theory. We then study the effect of using a gluon propagator from lattice simulations of pure SU(2) theory as an input in a potential model for the description of quarkonium, in the case of bottomonium and charmonium. We use, in both cases, a numerical approach to evaluate masses of quarkonium states. The resulting spectra are compared to calculations using the Coulomb plus linear (or Cornell) potential.
Cite
@article{arxiv.1408.3003,
title = {Heavy-quarkonium potential with input from lattice gauge theory},
author = {Willian Matioli Serenone},
journal= {arXiv preprint arXiv:1408.3003},
year = {2014}
}
Comments
151 pages, 21 figures, Dissertation presented to the Graduate Program in Physics at the Instituto de F\'isica de S\~ao Carlos, Universidade de S\~ao Paulo to obtain the degree of Master of Science. Concentration area: Fundamental Physics. Advisor: Prof. Dr. Tereza Cristina da Rocha Mendes