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arXiv · 2310.11434

Is $K_{1}/K^{*}$ enhancement in heavy ion collisions a signature of chiral symmetry restoration?

Haesom Sung·Sungtae Cho·Che Ming Ko·Su Houng Lee·Sanghoon Lim
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Abstract

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.

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Haesom Sung, Sungtae Cho, Che Ming Ko, Su Houng Lee, Sanghoon Lim. 2023-10-17. Is $K_{1}/K^{*}$ enhancement in heavy ion collisions a signature of chiral symmetry restoration?. https://doi.org/10.1103/physrevc.109.044911

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