The ATLAS open data dataset is comprised of real data recorded with the ATLAS detector in 2012 and matching simulated data.
Both real and simulated data is subjected to a loose event preselection to reduce processing time by reducing the overall number of events that have to be analysed.
Description:mc_110091.stop_tchan_antitop file index
Size: 14.5 MB
Please note that the file you are going to download (mc_110091.stop_tchan_antitop.root) is 14509120 bytes big. On an average ADSL connection, it may take long to download it (about 1 minute at 1Mbps).
Moreover, if you use one of the provided Virtual Machines to perform your analyses, then you don't need to download datasets manually, because the VM will fetch all the necessary file chunks via the XRootD protocol.
Manual download of files via HTTP is only necessary if you would prefer not to use the XRootD protocol for one reason or another.
How were these data selected?
The preselection consists of a set of object selection criteria and a subsequent event selection acting on these preselected objects.
The simulated (MonteCarlo) datasets used in the data release are shown where filtered using the same preselection as for real data.
The set contains samples for several Standard Model (SM) processes for several important backgrounds and some signal samples for SM and beyond SM processes.
How can you use these data?
You can access these data through the ATLAS Virtual Machines and Software. More documentation is available at:
These simulated datasets correspond to the data collected by the ATLAS experiment in 2012.
The open data are released under the Creative Commons CC0 waiver. Neither ATLAS nor CERN endorse any works, scientific or otherwise, produced using these data. All releases will have a unique DOI that you are requested to cite in any applications or publications.