Kaonic Hanbury-Brown-Twiss radii at 200 GeV and 5.02 TeV

TL;DR

This paper uses anisotropic hydrodynamics to predict kaon HBT radii in heavy-ion collisions at 200 GeV and 5.02 TeV, showing good agreement with data and observing approximate transverse mass scaling.

Contribution

It provides the first predictions of kaonic HBT radii at these energies using aHydroQP and compares them with experimental data.

Findings

Good agreement with experimental data at 200 GeV for $k_T \lesssim 0.8$ GeV

Predictions for 5.02 TeV collisions showing similar trends

Approximate transverse mass scaling observed, but no clear $k_T$ scaling

Abstract

We use 3+1D quasiparticle anisotropic hydrodynamics (aHydroQP) to make predictions for kaon Hanbury-Brown-Twiss (HBT) radii in 200 GeV and 5.02 TeV heavy-ion collisions. Using previously determined aHydroQP parameters, we compute kaonic HBT radii and their ratios as a function of the mean transverse momentum of the pair $k_T$. We first consider Au-Au collisions at 200 GeV, finding good agreement between aHydroQP predictions and experimental data up to $k_T \sim 0.8$ GeV. We then present predictions for kaonic HBT radii and their ratios in 5.02 TeV Pb-Pb collisions. Our aHydroQP predictions do not exhibit a clear $k_T$ scaling of the pion and kaon source radii, however, an approximate transverse mass $m_T$ scaling is observed, particularly at 200 GeV.