LAUSR

We discuss the properties of the $\Lambda_{c}$ baryon in nuclear matter at zero or finite temperature. Starting from the Lagrangian based on the heavy quark effective theory, we derive the effective Lagrangian for the $\Lambda_{c}$ baryon existing as an impurity particle. Adopting the one-loop calculation for nucleons, we derive the effective potential as the quantity for measuring the stability of the $\Lambda_{c}$ baryon in nuclear matter. The parameters in the Lagrangian are used by estimations in the lattice QCD simulations and the chiral extrapolations. We present that the $\Lambda_{c}$ baryon is bound in nuclei with the binding energy of about 20 MeV at normal nuclear matter density. We discuss the case that the $\Lambda_{c}$ baryon moves with constant velocity in nuclear matter. We also discuss the change of nucleon number density near the $\Lambda_{c}$ baryon in nuclear matter, and show that the $\Lambda_{c}$ baryon is a useful probe to research the higher density state in nuclear matter.