A thermal potential for the X(3872) as a molecular state

The X(3872) is an exotic quarkonium state which can not be explained within the quark model. Several configurations have been proposed for the internal structure of this state, being the most popular ones the compact tetraquark and the hadronic molecule. Recently, the X(3872) has been observed in heavy-ion collisions, in which a hot QCD medium is created. Studying how the medium modifies the properties of the X(3872) we can obtain additional information that might allow us to determine whether this state is a tetraquark or a molecule. In this thesis, we are going to build on the results of Phys. Rev. D 107, 054014 that studied this mysterious bound state within the molecule approximation using an approach based on chiral perturbation theory. The goal is to obtain the finite temperature potential of the X(3872), allowing us to make phenomenological predictions. On one hand, we will be able to determine up to which temperatures the bound state solution is still valid. On the other hand, the wave function of the state can be used to analyze recombination within the coalescence model.