Composite and elementary nature of a resonance in the sigma model
High Energy Physics - Phenomenology
2013-11-13 v1 Nuclear Theory
Abstract
We analyze the mixing nature of the low-lying scalar resonance consisting of the pipi composite and the elementary particle within the sigma model. A method to disentangle the mixing is formulated in the scattering theory with the concept of the two-level problem. We investigate the composite and elementary components of the sigma meson by changing a mixing parameter. We also study the dependence of the results on model parameters such as the cut-off value and the mass of the elementary sigma meson.
Keywords
Cite
@article{arxiv.1307.2031,
title = {Composite and elementary nature of a resonance in the sigma model},
author = {Hideko Nagahiro and Atsushi Hosaka},
journal= {arXiv preprint arXiv:1307.2031},
year = {2013}
}
Comments
13 pages, 11 figures, 2 tables