Array · dataset · 2019
Samples with full event information including tracker hits for tracking, ML, and top quark tagging studies
Listed in CERN Open Data
<p>Samples in this record are in a custom root ntuple format and contain the position of the hits and information from the generator-level objects associated to the tracker hits.
Description
The samples can be used to study top quark identification algorithms that use low-level detector information such as tracker hits. Machine learning algorithms are suitable for this classification task.</p><p> They have been produced from datasets, which consists of events extracted from simulated proton-proton collision events at a center-of-mass energy of 8 TeV generated with Pythia 6 (QCD) or MadGraph2.6 and Pythia6 (top-antitop pair sample).
The particles emerging from the collisions traverse through a simulation of the CMS detector. </p><p> The parent datasets of these samples contain light jets (QCD) in various energy ranges or all-hadronic high transverse momentum decays of top quarks and consist of hits from the tracking detector, reconstructed tracks, simulated tracks, generated particles, and jets clustered from the generated particles. The various objects are matched in order to reconstruct the provenance of the various hits.
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Samples are produced from the standard CMS format "AODSIM" plus a series of low-level tracker-related collections that allow the extraction of the tracker hits. </p> <p><table class="ui table striped"><thead> <tr> <th align="left">Data set name</th> <th align="left">Description</th> <th align="right">Number of events</th> <th align="right">Number of files</th> </tr> </thead> <tbody> <tr> <td align="left">QCD300to600</td> <td align="left">QCD, flat pT hat spectrum, 300 < pT hat < 600 GeV</td> <td align="right">1497600</td> <td align="right">2496</td> </tr> <tr> <td align="left">QCD400to600</td> <td align="left">QCD, flat pT hat spectrum, 400 < pT hat < 600 GeV</td> <td align="right">1989000</td> <td align="right">3315</td> </tr> <tr> <td align="left">QCD600to3000</td> <td align="left">QCD, flat pT hat spectrum, 600 < pT hat < 3000 GeV</td> <td align="right">2974800</td> <td align="right">4959</td> </tr> <tr> <td align="left">ttbar</td> <td align="left">ttbar, fully hadronic decays, pT of the top/antitop greater than 400 GeV</td> <td align="right">2969109</td> <td align="right">4055</td> </tr> </tbody> </table></p>
Links
Where it is published
- CERN Open Data record opendata.cern.ch/record/12220 ↗
landing page · from CERN Open Data
- DOI doi.org/10.7483/opendata.cms.chc3.5kpg ↗
DOI / persistent id · from CERN Open Data
Catalogue records · 1
- Record API opendata.cern.ch/api/records/12220 ↗
metadata API · from CERN Open Data
Topics
- Stated by source
- CMS
- From keywords
- Physics
- Inferred from text
- Simulation 75% · Tabular 65%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| CERN Open Data | 12220 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| byte_size | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| concepts[field].local:field:physics | mapping · CERN Open Data | connector:cern_opendata@1.0.0 | |
| concepts[instrument].cern_experiment:cms | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| concepts[method].local:method:simulation | enrichment · CERN Open Data | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[modality].local:modality:tabular | enrichment · CERN Open Data | keyword-concept-rules@1.0.0 | title+description (65%) |
| description | source · CERN Open Data | connector:cern_opendata@1.0.0 | /metadata/abstract/description |
| license | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| publication_date | source · CERN Open Data | connector:cern_opendata@1.0.0 | |
| title | source · CERN Open Data | connector:cern_opendata@1.0.0 | /metadata/title |