Diffusion of $Λ_c$ in hot hadronic medium and its impact on $Λ_c/D$ ratio

Abstract

The drag and diffusion coefficients of the $Λ_c(2286$ MeV) have been evaluated in the hadronic medium which is expected to be formed in the later stages of the evolving fire ball produced in heavy ion collisions at RHIC and LHC energies. The interactions between the $Λ_c$ and the hadrons in the medium have been derived from an effective hadronic Lagrangian as well as from the scattering lengths, obtained in the framework of heavy baryon chiral perturbation theory (HB$χ$PT). In both the approaches, the magnitude of the transport coefficients are turn out to be significant. A larger value is obtained in the former approach with respect to the latter. Significant values of the coefficients indicate substantial amount of interaction of the $Λ_c$ with the hadronic thermal bath. Furthermore, the transport coefficients of the $Λ_c$ is found to be different from the transport coefficients of $D$ meson. Present study indicates that the hadronic medium has a significant impact on the $Λ_c/D$ ratio in heavy ion collisions.

6 pages, 5 figures