Abstract
The ATLAS Collaboration at the Large Hadron Collider is releasing a new set of recorded and simulated data samples at a centre-of-mass energy of 13 TeV collected in pp collisions at the LHC. This new dataset was designed after an in-depth review of the usage of the previous release of samples at 8 TeV. That review showed that capacity-building is one of the most important and abundant uses of public ATLAS samples. To fulfil the requirements of the community and at the same time attract new users and use cases, we developed real analysis software based on ROOT in two of the most popular programming languages: C++ and Python. These so-called analysis frameworks are complex enough to reproduce with reasonable accuracy the results -figures and final yields- of published ATLAS Collaboration physics papers, but still light enough to be run on commodity hardware. With the computers that university students and regular classrooms typically have, students can explore LHC data with similar techniques to those used by current ATLAS analysers. We present the development path and the final result of these analysis frameworks, their products and how they are distributed to final users inside and outside the ATLAS community.
Highlights
The main purpose of the ATLAS Open Data is to provide open access to proton-proton collision data and software and analysis tools from the ATLAS experiment at the Large Hadron Collider (LHC), in accordance with the ATLAS Open Data Access policy [1], which sets out the guidelines regarding open access to ATLAS data by non-ATLAS members with a focus on education, training and outreach
In addition to acquiring particle-physics knowledge, the students have the opportunity to work with modern software tools based on new technology and get an insight into principles of cloud and distributed computing
The samples are accompanied by data processing and analysis tools
Summary
The main purpose of the ATLAS Open Data is to provide open access to proton-proton (pp) collision data and software and analysis tools from the ATLAS experiment at the Large Hadron Collider (LHC), in accordance with the ATLAS Open Data Access policy [1], which sets out the guidelines regarding open access to ATLAS data by non-ATLAS members with a focus on education, training and outreach. In 2012 an ATLAS protonproton collision data sample of 2 fb−1 at an energy of 8 TeV was released in XML format and used to “search”, among other particles, for the Higgs boson. This is followed by an 8-TeV data sample, corresponding to 1 fb−1, in ROOT [6] format, accompanied by the corresponding analysis tools [7] and aimed for undergraduate physics students. The new data release features the highest pp collision energy available at the LHC, 10 times more luminosity, nearly 3 times more MC samples, and 7 times more data collections. Tau-leptons, large-radius jets, b-quark and bosontagging, as well as systematics are available in the 13 TeV release, enabling more detailed studies
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