"The new Track Reconstruction for the ATLAS Inner Detector"
Presented by Markus ELSING
Type: oral presentation
Track: Event processing applications
Over the past 3 years the ATLAS Inner Detector reconstruction software has undergone a major redesign based on the recommendations of an internal review in spring 2003. The new track reconstruction infrastructure is characterized by: - a standardized ATLAS geometry model - a common track reconstruction data model - a suite of common extrapolation, track fitting, vertexing and pattern recognition tools with abstract interfaces to all functional modules - a suite of detector specific reconstruction tools with abstract interfaces - a chain of reconstruction algorithms building on this infrastructure An important aspect of the new track reconstruction infrastructure is that the geometry, data model and common tools are shared between the ATLAS Inner Detector and Muon system software to allow for a maximum communality in their code base. The implementation has been done using a mixture of existing code fragments from the legacy reconstruction packages migrated into the new framework and new functional components previously not available in ATLAS. The new Inner Detector reconstruction is designed to run offline and in the Event Filter, the latter involves seeding the reconstruction from the Level-2 trigger result. In the talk an overview of the ATLAS new tracking is given and results are shown for the different use-cases like real data from the full slice ATLAS combined test beam, offline reconstruction of full simulation, Event Filter studies and Inner Detector commissioning with cosmic data.