Compositeness of Near Threshold Quasi-Bound States
High Energy Physics - Phenomenology
2016-06-22 v1 Nuclear Theory
Abstract
We study the compositeness of unstable hadrons which lie near the two-hadron threshold. In the framework of the effective field theory, we derive the relation between the compositeness of stable bound states with observables. We then extend this relation for the quasi-bound states with finite decay width. A prescription to interpret the complex value of the compositeness is presented. With this method, we show that Lambda(1405) is dominated by the Kbar N composite component and a_0(980) have only small Kbar K fraction.
Keywords
Cite
@article{arxiv.1512.03905,
title = {Compositeness of Near Threshold Quasi-Bound States},
author = {Yuki Kamiya and Tetsuo Hyodo},
journal= {arXiv preprint arXiv:1512.03905},
year = {2016}
}
Comments
6 pages, no figure, talk given at the XVI International Conference on Hadron Spectroscopy (Hadron2015), Sep. 13-18, 2015, Newport News, VA