The PandaRoot framework for simulation, reconstruction and analysis

Abstract

The PANDA experiment at the future facility FAIR will study anti-proton proton and anti-proton nucleus collisions in a beam momentum range from 2 GeV/c up to 15 GeV/c. The PandaRoot framework is part of the FairRoot project, a common software framework for the future FAIR experiments, and is currently used to simulate detector performances and to evaluate different detector concepts. It is based on the packages ROOT and Virtual MonteCarlo with Geant3 and Geant4. Different reconstruction algorithms for tracking and particle identification are under development and optimization, in order to achieve the performance requirements of the experiment. In the central tracker a first track fit is performed using a conformal map transformation based on a helix assumption, then the track is used as input for a Kalman Filter (package genfit), using GEANE as track follower. The track is then correlated to the pid detectors (e.g. Cerenkov detectors, EM Calorimeter or Muon Chambers) to evaluate a global particle identification probability, using a Bayesian approach or multivariate methods. Further implemented packages in PandaRoot are: the analysis tools framework Rho, the kinematic fitter package for vertex and mass constraint fits, and a fast simulation code based upon parametrized detector responses. PandaRoot was also tested on an Alien-based GRID infrastructure. The contribution will report about the status of PandaRoot and show some example results for analysis of physics benchmark channels.

Particle identification algorithms for the PANDA Endcap Disc DIRC

“…The Monte-Carlo simulations have been performed with the PandaRoot framework [5], that has been designed for the data analysis of PANDA and also includes a simulation part based on Virtual Monte Carlo (VMC). VMC is implemented in ROOT and uses the Geant4 transport algorithms.…”

Hyperons - a strange key to the strong interaction

“…The simulations were performed using the PandaROOT framework [63], with ideal pattern recognition and particle identification. Additional selection criteria were applied that mimic the effects from a full, realistic implementation.…”

The PANDA Detector at FAIR

“…For the simulation and analysis, a dedicated framework called PandaRoot [11], that is based on ROOT, was developed. This framework includes the geometries of all PANDA subdetectors together with the important simulation parameters and passive volumes.…”