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

Abstract

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 Lagrangian framework, we estimate the vacuum cross sections as well as the thermal cross sections of the production processes ${\bar{D}}_s^{(\ast )}{D}_s^{(\ast )}\to Z_{cs}^{-}X(X=\pi ,K,\eta )$ and the corresponding inverse reactions. The results indicate that the considered processes have sizeable cross sections. Most importantly, the thermal cross sections for $Z_{cs}$ annihilation are much larger than those for production. This feature might produce relevant effects on some observables, such as the final $Z_{cs}$ multiplicity, measured in heavy ion collisions.

arXiv comment8 pages; 6 figures

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