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arXiv · 1811.07286

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

Shigehiro Yasui
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Abstract

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

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Shigehiro Yasui. 2019-12-03. Fate of the charm baryon $Λ_{c}$ in cold and hot nuclear matter. https://doi.org/10.1103/physrevc.100.065201

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