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In this work we study the interactions of the multiquark state $Z_{cs}(3985)^-$ with light mesons in a hot hadron gas. Using an Effective Lagrangianframework, we estimate the vacuum cross sections as well as the thermal crosssections of the production processes $ \bar{D}_{s}^{(*)} D_{s}^{(*)}\rightarrow Z_{cs}^- X \, (X=\pi , K, \eta) $ and the corresponding inversereactions. The results indicate that the considered processes have sizeablecross sections. Most importantly, the thermal cross sections for $Z_{cs}$annihilation are much larger than those for production. This feature mightproduce relevant effects on some observables, such as the final $Z_{cs}$multiplicity, measured in heavy ion collisions.

Hadronic medium effects on $Z_{cs} (3985)^-$ production in heavy-ion collisions