H1prelim-01-181

A new object-oriented physics analysis framework for the H1 experiment

Reference A Meyer, to be presented at EPS 2001, July 2001
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Abstract The H1 Collaboration is currently upgrading its analysis software. The new integrated object-oriented physics analysis framework is based on the RooT framework and comprises a new data storage scheme, a data access front-end, and a new event display. The analysis data is stored in three layers of separate files. The uppermost event-summary layer ('HAT') facilitates a fast selection via event classification and kinematics. At the particle level (second layer, 'microODS') a custom-built pointer relation ('H1Pointer') allows for direct access from the particle 4-vectors to the corresponding track and cluster information which is stored at reconstruction level ('ODS'). The user access to the data files is encapsulated using extensions to the RooT tree class in connection with a MySQL database.
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