Open charm meson in nuclear matter at finite temperature beyond the zero range approximation

Abstract

The properties of open charm mesons, $D$, $\bar{D}$, $D_s$ and ${\bar{D}}_s$ in nuclear matter at finite temperature are studied within a self-consistent coupled-channel approach. The interaction of the low lying pseudoscalar mesons with the ground state baryons in the charm sector is derived from a $t$-channel vector-exchange model. The in-medium scattering amplitudes are obtained by solving the Lippmann-Schwinger equation at finite temperature including Pauli blocking effects, as well as $D$, $\bar{D}$, $D_s$ and ${\bar{D}}_s$ self-energies taking their mutual influence into account. We find that the in-medium properties of the $D$ meson are affected by the $D_s$-meson self-energy through the intermediate $D_{s}Y$ loops coupled to $DN$ states. Similarly, dressing the $\bar{D}$ meson in the $\bar{D}Y$ loops has an influence over the properties of the ${\bar{D}}_s$ meson.

Comments: 23 pages, 9 figures, 2 tables