TY  - JOUR
AU  - Baru, V.
AU  - Dong, X. K.
AU  - Du, M. L.
AU  - Filin, A.
AU  - Guo, F. K.
AU  - Hanhart, C.
AU  - Nefediev, A.
AU  - Nieves, J.
AU  - Wang, Q.
PY  - 2022
DA  - 2022//
TI  - Effective range expansion for narrow near-threshold resonances
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 137290
EP  - 7pp
VL  - 833
PB  - Elsevier
KW  - Effective range expansion
KW  - Exotic states
KW  - Tetraquarks
KW  - Hadronic molecules
AB  - 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.
SN  - 0370-2693
UR  - https://arxiv.org/abs/2110.07484
UR  - https://doi.org/10.1016/j.physletb.2022.137290
DO  - 10.1016/j.physletb.2022.137290
LA  - English
N1  - WOS:000837882700019
ID  - Baru_etal2022
ER  -