HepMCAnalyser: A tool for Monte Carlo Generator Validation

HepMCAnalyser is a tool for Monte Carlo (MC) generator validation and comparisons. It is a stable, easytouse and extendable framework allowing for easy access/integration to generator level analysis. It comprises a class library with benchmark physics processes to analyse MC generator HepMC output and to fill root histograms. A web-interface is provided to display all or selected histogramms, compare to references and validate the results based on Kolmogorov Tests. Steerable example programs can be used for event generation. The default steering is tuned to optimally align the distributions of the different MC generators. The tool will be used for MC generator validation by the Generator Services (GENSER) LCG project, e.g. for version upgrades. It is supported on the same platforms as the GENSER libraries and is already in use at ATLAS.