%0 Journal Article
%T Effective range expansion for narrow near-threshold resonances
%A Baru, V.
%A Dong, X. K.
%A Du, M. L.
%A Filin, A.
%A Guo, F. K.
%A Hanhart, C.
%A Nefediev, A.
%A Nieves, J.
%A Wang, Q.
%J Physics Letters B
%D 2022
%V 833
%I Elsevier
%@ 0370-2693
%G English
%F Baru_etal2022
%O WOS:000837882700019
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5327), last updated on Tue, 30 Aug 2022 11:28:09 +0000
%X 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.
%K Effective range expansion
%K Exotic states
%K Tetraquarks
%K Hadronic molecules
%R 10.1016/j.physletb.2022.137290
%U https://arxiv.org/abs/2110.07484
%U https://doi.org/10.1016/j.physletb.2022.137290
%P 137290-7pp