Scalar Mesons, Glueballs, Instantons and the Glueball/Sigma
High Energy Physics - Phenomenology
2009-11-07 v1
Abstract
We include instanton effects in QCD sum rules for coupled scalar glueballs and mesons. We find a light glueball/sigma as in earlier studies without instantons, but in a lattice-type pure instanton model the light glueball/sigma is not found. In the 1-2 Gev region we now find that lightest I=0 meson, in the region of the f(1370), has no direct glueball mixing, with the instanton loop replacing the glueball component. The lightest scalar mainly glueball in the region of the f(1500) is sensitive to the choice of nonperturbative gluonic parameters.
Cite
@article{arxiv.hep-ph/0106158,
title = {Scalar Mesons, Glueballs, Instantons and the Glueball/Sigma},
author = {Leonard S. Kisslinger and Mikkel B. Johnson},
journal= {arXiv preprint arXiv:hep-ph/0106158},
year = {2009}
}
Comments
12 pages, 4 figures