Speaker
Description
We study the modification of $\eta$ meson mass in a medium comprise of nucleons and hyperons. The interaction terms for the $\eta$ mesons are derived using chiral hadronic mean field SU(3) model. Within chiral SU(3) model, in-medium properties of nucleons and hyperons are modified through their interactions with the scalar ($\sigma$, $\zeta$ and $\delta$) and vectors fields ($\omega$, $\rho$ and $\phi$). We solve the coupled equations of motion for these scalar and vector fields for finite strangeness fraction and isospin asymmetry of the medium and evaluate the optical potentials of $\eta$ mesons in hot and dense matter. The present results on in-medium properties may play an important role in understanding $\eta$-nuclei bound states and also the photo-production of $\eta$ mesons.
