The Data
The Data
Current open access ATLAS data is delivered by the ATLAS Open Data project for Education. The dataset consists of a series of ROOT-kind ntuples files containing real data recorded by the ATLAS Experiment at a centre-of-mass energy of 13 TeV. It also includes a set of simulated, Monte Carlo (MC), samples ranging from very well-known Standard Model processes to some hypothetical Beyond Standard Model physics.
| Description | Name | link to ZIP file |
|---|---|---|
| events selected with at least one lepton (electron or muon) and exactly one large-Radius jet (R = 1.0) | 1largeRjet1lep | 5.5 Gb |
| events selected with exactly one lepton (electron or muon). This is a very large collection, so, it was divided into three ZIP files | 1lep | 17 Gb, 20 Gb, 21 Gb |
| events selected with exactly one lepton (electron or muon) and exactly one hadronic-reconstructed tau | 1lep1tau | 1.3 Gb |
| events selected with at least two leptons (electron or muon) | 2lep | 24 Gb |
| events selected with exactly three leptons (electron or muon) | 3lep | 1.0 Gb |
| events selected with at least four leptons (electron or muon) | 4lep | 427 Mb |
| events selected with at least two photons | GamGam | 1.5 Gb |
Select the data you want to access and explore its specific resources
| The 8 TeV samples | The 13 TeV samples | Custom samples |
|---|---|---|
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| Learn more about the 2016 datasets | Explore the 10x more data in 2020 datasets | Dedicated samples for advance usage |
Evolution of the ATLAS Open Data
from the 8 TeV release (2016) to the 13 TeV release (2020)
The evolution of the ATLAS Open Data and the tuple structure from the 8 TeV releasein 2016 (samples and DOI @CERN Open Data) to the 13 TeV release (samples and DOI @CERN Open Data)are depicted below:
More Data
After a review of the usage of the 8 TeV dataset around the world (2018), ATLAS decided to make public 10 times more data with centre-of-mass energy at 13 TeV (2020).
Multiple interactions show that educators and students want to design and perform more complex tasks and physics. To match the request, ATLAS also increase the number and type of simulated data, so-called signals and backgrounds that allow to study common Standard Model and also Beyond Standard Model
More Information
But, more data is no the only improvement: more information is also part of the updates. ATLAS Open Data designs a richer dataset adding new particles (photons), objects (e.g. Large-R jets) and variables that allow to replicate searches for New Physics, systematic variations and the re-discovery of the Higgs boson in other decays modes
