Effective range expansion for narrow near-threshold resonances
High Energy Physics - Phenomenology
2022-07-25 v2 High Energy Physics - Experiment
High Energy Physics - Lattice
Nuclear Theory
Abstract
We discuss some general features of the effective range expansion, the content of its parameters with respect to the nature of the pertinent near-threshold states and the necessary modifications in the presence of coupled channels, isospin violations and unstable constituents. As illustrative examples, we analyse the properties of the and states supporting the claim that these exotic states have a predominantly molecular nature.
Keywords
Cite
@article{arxiv.2110.07484,
title = {Effective range expansion for narrow near-threshold resonances},
author = {Vadim Baru and Xiang-Kun Dong and Meng-Lin Du and Arseniy Filin and Feng-Kun Guo and Christoph Hanhart and Alexey Nefediev and Juan Nieves and Qian Wang},
journal= {arXiv preprint arXiv:2110.07484},
year = {2022}
}
Comments
15 pages, 1 figure