Resonance production in PbPb collisions at 5.02 TeV via hydrodynamics and hadronic afterburner

Abstract

Using a relativistic hydrodynamics + hadronic afterburner simulation we explore resonance production in PbPb collisions at 5.02 TeV, and demonstrate that many resonance yields, mean transverse momenta, and flows are very sensitive to the late stage hadronic rescattering. Out of all measured resonances $\hat{I}›(1520)$ is affected strongest by the hadronic rescattering stage, which allows to estimate its duration, and even constrain branching ratios of $\hat{I}{\pounds }^{\ast }\to \hat{I}›(1520)\ddot{I}€$ decays. Strong suppression of $\hat{I}›(1520)$, which in vacuum has a lifetime of 12.6 fm/$c$, is explained by its small lifetime in a hadronic medium, between 1 and 2 fm/$c$ at temperatures between 100 and 150 MeV. We find that some resonances like $\hat{I}”(1232)$, $f_0(980)$, $a_0(980)$, $\hat{I}›(1405)$ are enhanced rather than suppressed by the afterburner.

12 pages, 9 figures