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We report on the $U_{A}(1)$ symmetry restoration resulting due to temperaturedependence of the coefficient c(T) for the Kobayashi-Maskawa-'t Hooftdeterminant (KMT) term in a modified 2+1 flavor Polyakov loop quark meson modelhaving fermionic vacuum correction term (PQMVT).Temperature dependence of KMTcoupling c(T) drives the non-strange condensate melting to significantlysmaller temperatures in comparison to the constant c case.Further due to c(T),$m_{\eta^{\prime}}$ decreases from its vacuum value by 220 MeV near T=176 MeVafter the chiral transition ($T_{c}^{\chi}=154.9$ MeV).This is similar to the$\eta^{\prime}$ in-medium mass drop of at least 200 MeV as reported by Csorgoand Vertesi in Ref (Phys Rev Lett 105:182301,2010; Phys Rev C 83:054903,2011),as an experimental signature of the effective restoration of $U_A(1)$ symmetry.The pseudoscalar mixing angle $\theta_p$ achieves anti-ideal mixing in theinfluence of c(T). The $\eta $ meson becomes light quark system ($ \eta_{NS} $)at T=176 MeV and changes its identity with $ \eta' $ meson which becomesstrange quark system ($ \eta_{S} $). The degenerated temperature variations of$\sigma$, $\pi$ meson masses merges with the temperature variations of themasses of degenerated $a_{0}$, $\eta$ mesons near 275 MeV. It means that forc(T) when $m_{\sigma}=400$ MeV, the $U_{A}(1)$ restoration takes place at 1.75$T_{c}^{\chi}$=275 MeV.

Exploring axial $U(1)$ restoration in a modified 2+1 flavor Polyakov quark meson model