@Article{Baru_etal2022, author="Baru, V. and Dong, X. K. and Du, M. L. and Filin, A. and Guo, F. K. and Hanhart, C. and Nefediev, A. and Nieves, J. and Wang, Q.", title="Effective range expansion for narrow near-threshold resonances", journal="Physics Letters B", year="2022", publisher="Elsevier", volume="833", pages="137290--7pp", optkeywords="Effective range expansion; Exotic states; Tetraquarks; Hadronic molecules", 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 chi(c1)(3872) and T-cc(+) states supporting the claim that these exotic states have a predominantly molecular nature.", optnote="WOS:000837882700019", optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5327), last updated on Tue, 30 Aug 2022 11:28:09 +0000", issn="0370-2693", doi="10.1016/j.physletb.2022.137290", opturl="https://arxiv.org/abs/2110.07484", opturl="https://doi.org/10.1016/j.physletb.2022.137290", language="English" }