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I discuss the properties of the $\Lambda_{c}$ baryon in nuclear matter atzero or finite temperature. Starting from the Lagrangian based on theheavy-quark effective theory, I derive the effective Lagrangian for the$\Lambda_{c}$ baryon existing as an impurity particle. Adopting the one-loopcalculation for nucleons, I derive the effective potential as the quantity formeasuring the stability of the $\Lambda_{c}$ baryon in nuclear matter. Theparameters in the Lagrangian are fitted to reproduce the scattering length ofthe nucleon and the $\Lambda_{c}$ baryon estimated in the lattice QCDsimulations and the chiral extrapolations. I present that the $\Lambda_{c}$baryon is bound in nuclei with the binding energy of about 20 MeV at normalnuclear-matter density. I discuss the case that the $\Lambda_{c}$ baryon moveswith a constant velocity. I also discuss an increase of the nucleon numberdensity near the $\Lambda_{c}$ baryon in nuclear matter, and show that the$\Lambda_{c}$ baryon is a useful probe to research the nuclear systems at highdensity.

Fate of the charm baryon $\Lambda_{c}$ in cold and hot nuclear matter