In this study, we utilize light-cone QCD sum rules at twist-3 accuracy to compute the coupling parameters of the χc1(2P) state with D and D∗ mesons. The analysis reveals that the observed χc1(3872) meson incorporates significant amounts of both charmonium and molecular components. The interplay between these components highlights the exotic nature of χc1(3872). Furthermore, implications for a possible mixing between the χb1(2P) state and a potential BBˉ∗ molecule is discussed. These findings contribute to the understanding of exotic hadron states and their intricate internal structures.
@article{arxiv.2503.15632,
title = {Charmonium content of $\chi_{c1}(3872)$ in light-cone sum rules at twist 3},
author = {Tarik Akan and Mehmet Ali Olpak and Altug Ozpineci},
journal= {arXiv preprint arXiv:2503.15632},
year = {2025}
}