Femtoscopy of $DN$ and $\bar{D}N$ systems

Abstract: The capability of the ALICE@LHC and STAR@RHIC experiments to reconstruct $D$ mesons has enabled femtoscopic correlation measurements of open-charm mesons in both small and large systems. In this work, we present a theoretical calculation of the correlation functions of $D$ and $\bar{D}$ mesons with nucleons, based on the Koonin-Pratt formalism applied to the systems produced in these high-energy collisions. We use an effective Lagrangian that models the interaction between charmed mesons and baryons. From the unitarized on-shell amplitudes, we extract the low-energy scattering parameters and compute the correlation functions using the Lednick\'y-Lyuboshitz approximation. Additionally, we apply the TROY formalism to obtain the off-shell $T$-matrix in coupled channels and reconstruct the full wave function, which we incorporate into the Koonin-Pratt formula. We compare these two approaches and provide predictions for different correlated pairs, including the effects of the Coulomb interaction and thermal weights for the coupled channels. These results can be tested against current and future experimental data from ALICE and STAR collaborations in both proton-proton and heavy-ion collisions.