Scalar Mesons as qbar^2 q^2? Insight from the Lattice
High Energy Physics - Lattice
2009-11-10 v1 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
I describe some insight obtained from a lattice calculation on the possibility that the light scalar mesons are \qbar^2 q^2 states rather than \qbar q. First I review some general features of \qbar^2 q^2 states in QCD inspired quark models. Then I describe a lattice QCD calculation of pseudoscalar meson scattering amplitudes, ignoring quark loops and quark annihilation, which finds indications that for sufficiently heavy quarks there is a stable four-quark bound state with JPC=0{++} and non-exotic flavor quantum numbers.
Keywords
Cite
@article{arxiv.hep-lat/0306037,
title = {Scalar Mesons as qbar^2 q^2? Insight from the Lattice},
author = {M. Alford and R. L. Jaffe},
journal= {arXiv preprint arXiv:hep-lat/0306037},
year = {2009}
}
Comments
13 pages, 4 images, uses aipproc.cls