Speaker
Description
The recently observed doubly charmed state $T_{cc}^+$ belongs to the family
of the multiquark states called exotic hadrons. One of main goals of
modern hadron physics is to determine the strucutre of these exotic hadrons.
Nucleus-nucleus collisions at the LHC offer a possibility to achieve this goal.
The yield of $T_{cc}^+$'s produced at the end of the quark-gluon plasma
phase of nuclear collisions is related to the internal
structure of the state. However this yield may be affected by the
interactions in the hadron gas phase. We investigate the absorption and
production processes of this new state in a hadronic medium, considering
the reactions $T_{cc}^+ \pi, T_{cc}^+ \rho \rightarrow D^{(*)} D^{(*)} $ and
the corresponding inverses reactions. We use effective field Lagrangians to
account for the couplings between light and heavy mesons.
The absorption cross sections are
found to be larger than the production ones. We compare our results with the
only existing estimate of these quantities, presented in a work of
J.~Hong, S.~Cho, T.~Song and S.~H.~Lee, in which the authors employed the
quasi-free approximation. We find cross sections which are one order of
magnitude smaller. The subject deserves further investigation.
