Study of Jet Substructure in the ATLAS Experiment using Distributed Analysis within Spanish Tier-2 Infrastructures

The first study of jet substructure on LHC data was performed by the ATLAS experiment. The jet algorithm chosen was AntiKt with R-parameter=1.0. This study has been important to check the working of the substructure variables which allow to distinguish boosted objects from background. In this study, the computing part has had a great importance because the work done into the ATLAS Spanish Tier-2 federation on understanding its performance and its operations. This has allowed the access of hundred of million of events to obtain the results using Grid technologies for Distributed Analysis. Also, this activity helped in other physics studies of ATLAS experiment.