Speaker
Description
We present first results on identical pion intensity interferometry (HBT) studied in collisions of Au$(1.23A \mathrm{GeV})$+Au. The data are taken with the HADES spectrometer at SIS18/GSI Darmstadt. We study the dependence of the space-time extent of the pion emitting source on the pair transverse momentum and on the collision centrality. We compare our femtoscopic findings taken at an available energy of $\sqrt{s_{NN}}=2.4$ GeV to similar results derived at higher collision energies, both with fixed-target and collider experiments. A surprising uniformity of the three-dimensional (Bertsch-Pratt parameterized) source is found, extending now over three orders of magnitude in collisions energy from LHC over RHIC, SPS, and AGS down to the virtually lowest one at SIS18.
| List of tracks | Femtoscopy in A+A, p+p , p+A and e+-e- collisions at relativistic, intermediate and low energies |
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