Simulation Studies of Benchmark Test with Lambda Particle at MiniCBM Experiment

The Compressed Baryonic Matter (CBM) experiment at the upcoming Facility for Anti- proton and Ion Research (FAIR), Darmstadt, Germany will study dense regions of phase space diagram of strongly interacting matter in nucleus-nucleus collisions of 2–11 AGeV Kinetic Energies. Unprecedented interaction rates reaching upto 10 MHz will be the unique feature at CBM and long with a free-streaming mode of data acquisition for all the detector subsystems. A precursor to CBM called mini-CBM experiment has been setup at SIS18 beamline of GSI as part of FAIR-phase0 program. Real size Prototype detectors of various subsystems of CBM such as the Silicon Tracking Station(STS), Muon Chamber (MuCh) system, Time of Flight (TOF) Detector etc. have been installed. Testing the reconstruction abilities of the detectors in self-triggered mode at the highest rates in mCBM is one of main goals at mCBM. In this report, we present the simulation results on time-based reconstruction of \(\Lambda \) as part of the benchmark study in mCBM experiment. Data with O-Ni collisions at T= 2 AGeV have been recently collected at a rate of \(10^5\) ions per collision at mCBM, and analysis of this data is underway. We have attempted to investigate the characteristics of Lambda reconstruction through realistic simulations. It has been carried out in CBMROOT framework. The actual geometry of the experimental setup along with detector material was implemented in GEANT. URQMD based event generator was used to simulate O-Ni collisions at T=2 AGeV. A total \(10^8\) events were simulated and transported using GEANT 3 monte-carlo (MC) based engine. After transport, we convert MC points into digital signals (or digis) and perform hit and time-based event reconstruction, by clubbing together the hits in a time window of 200 ns. The potential proton and pion track candidates were extracted primarily based on their time of flight and a set of topological cut parameters. The reconstruction efficiency was estimated to be about 0.01%. The description of the mCBM experimental setup and the details of the reconstruction procedure in a triggerless approach will be presented and discussed.