Is K_1/K^* enhancement in heavy ion collisions a signature of chiral symmetry restoration?

We extend the recent study of K_1/K^* enhancement as a signature of chiral symmetry restoration in heavy ion collisions at the Large Hadron Collider (LHC) via the kinetic approach to include the effects due to non-unity hadron fugacities during the evolution of produced hadronic matter and the temperature-dependent K_1 mass. Although the effect of non-unity fugacity only slightly reduces the K_1/K^* enhancement due to chiral symmetry restoration, the inclusion of the temperature-dependent K_1 mass leads to a substantial reduction in the K_1/K^* enhancement. However, the final K_1/K^* ratio in peripheral collisions still shows a more than factor of two enhancement compared to the case without chiral symmetry restoration and thus remains a good signature for chiral symmetry restoration in the hot dense matter produced in relativistic heavy ion collisions.