No abstract

In March 2019 the HADES experiment recorded 14 billion Ag+Ag collisions at √sNN = 2.55 GeV as a part of the FAIR phase-0 physics program. In this contribution, we present and investigate our capabilities to reconstruct and analyze weakly decaying strange hadrons and hypernuclei emerging from these collisions. The focus is put on measuring the mean lifetimes of these particles.

The HADES Experiment (High Acceptance DiLepton Spectrometer) aims to measure baryonic matter at high densities but moderate fireball temperatures using heavy ion collisions. In a recent Ag+Ag beamtime, at an incident energy of 1.58 A GeV, 15.268 × 10 9 events have been collected at triggered event rates of 16-18 kHz. The data were recorded with the upgraded RICH detector, including the newly developed DiRICH readout chain and using HAMAMATSU H12700 MAPMTs as photon detector. In this article, we demonstrate the success of this upgrade and present first result on timing precision of the full HADES RICH detector. K: Cherenkov detectors; Performance of High Energy Physics Detectors; Front-end electronics for detector readout; Instrumentation and methods for heavy-ion reactions and fission studies 1Corresponding author.