The experimental progress made in the last decades allowed the observation of states whose properties do not match to those of mesons and baryons. The nature and internal structure of these so-called exotic hadronic states remain as a subject of great debate, apparently still far from a definitive answer. The objective of this seminar is to present a brief review and discuss the state-of-the-art of the main theoretical interpretations for the unconventional hadrons proposed in the literature, such as the hadronic molecules. We will end by discussing our contributions on this topic, with focus on the properties of the X(3872) and T_cc^+ states in the scenario of heavy-ion collisions.
IFIC Seminar Organizers