• Help
    Discussion forum
    Search tips
  • About
    CERN Open Data
    ALICE
    ATLAS
    CMS
    DELPHI
    LHCb
    OPERA
    TOTEM
    Glossary

J/psi to two muons from 2011

McCauley, Thomas

Dataset Derived Education CMS CERN-LHC Parent Dataset: Datasets derived from the Run2011A SingleElectron, SingleMu, DoubleElectron, and DoubleMu primary datasets


Description

This document contains 20k events where two muon candidates with invariant mass near the mass of J/psi were observed. The data was selected from the primary dataset DoubleMu 2011. These data were selected for use in education and outreach and contain a subset of the total event information. They are not suitable for a full physics analysis.

Related datasets

This data file and other similar data files can be found from

Datasets derived from the Run2011A SingleElectron, SingleMu, DoubleElectron, and DoubleMu primary datasets

Dataset characteristics

20000 events.

Dataset semantics

Variable Type Description
Run The run number of the event.
Event The event number.
type Either T or G: whether the muon is a tracker or global muon.
E The total energy of the muon (GeV).
px,py,pz The components of the momemtum of the muon (GeV).
pt The transverse momentum of the muon (GeV).
eta The pseudorapidity of the muon.
phi The phi angle of the muon (rad).
Q The charge of the muon.

How were these data selected?

An event was selected if there were two muons in the event, both with |eta| < 2.4, at least one muon was a global muon, the invariant mass of the two muons was > 2 GeV and < 5 GeV, and they have opposite-sign charge.

How can you use these data?

Comma-separated value (csv) files can be used in online applications such as the histogram visualizer and other applications, examples are given in

Jupyter notebooks using CMS Open Data

Instructions for use of CMS Open Data in R

Instructions for use of CMS Open Data in spreadsheets


      

Files and indexes

Disclaimer

These open data are released under the Creative Commons Zero v1.0 Universal license.

Logo CC0-1.0

Neither the experiment(s) ( CMS ) nor CERN endorse any works, scientific or otherwise, produced using these data.

ALICE experiment
ATLAS experiment
CMS experiment
DELPHI experiment
LHCb experiment
OPERA experiment
PHENIX experiment
TOTEM experiment
© CERN, 2014–2025 ·
Terms of Use ·
Privacy Policy ·
Help ·
GitHub ·
Twitter ·
Email
Powered by Invenio
Open Data Portal v0.4.3
CERN