$D$ and $D^{\ast }$ mesons in isospin asymmetric nuclear medium

Abstract

We investigate the properties of pseudoscalar $D$ and vector $D^{\ast }$ mesons in an isospin asymmetric nuclear medium using a hybrid approach that integrates the light-front quark model with the chiral SU(3) quark mean field model. The influence of isospin asymmetric nuclear medium is examined by utilizing the in-medium quark masses derived from the chiral SU(3) quark mean field model as an input in the light-front quark model to study the medium modification of $D$ mesons. We examine the impact of isospin asymmetry and baryon density at zero and finite temperature on the effective masses, weak decay constants, and distribution amplitudes of the pseudoscalar mesons $D^0$, $D^{+}$, $D_s$, and the vector mesons $D^{0\ast }$, $D^{+\ast }$, and $D_s^{\ast }$. Our results indicate significant medium-induced changes for pseudoscalar $D$ and vector $D^{\ast }$ mesons having $u/d$ as one of their constituent quarks, while a comparatively reduced effect is observed for mesons containing a strange quark. In contrast to temperature and isospin asymmetry, changes in the baryon density of the nuclear medium have a larger effect on different properties of $D$ and $D^{\ast }$ mesons.

Comments: 33 pages, 9 figures