Tetraquarks from the Bethe-Salpeter equation
High Energy Physics - Phenomenology
2015-07-20 v1 Nuclear Theory
Abstract
We present a numerical solution of the four-quark Bethe-Salpeter equation for a scalar tetraquark. We find that the four-body equation dynamically generates pseudoscalar poles in the Bethe-Salpeter amplitude. The sensitivity to the pion poles leads to a light isoscalar tetraquark mass M ~ 400 MeV, which is comparable to that of the sigma/f0(500). The masses of its multiplet partners kappa and a0/f0 follow a similar pattern, thereby providing support for the tetraquark interpretation of the light scalar nonet.
Cite
@article{arxiv.1507.05022,
title = {Tetraquarks from the Bethe-Salpeter equation},
author = {Gernot Eichmann and Christian S. Fischer and Walter Heupel},
journal= {arXiv preprint arXiv:1507.05022},
year = {2015}
}
Comments
7 pages, 4 figures. Proceedings of the workshop "Excited QCD 2015", Tatranska Lomnica, Slovakia, March 8-14, 2015. To be published in Acta Physica Polonica B Proc. Suppl