It’s the part of the dataset name before the second 'slash', i.e. for the dataset
the dataset name is
CMS uses the following convention for this name:
PROCESSis the physics process in the sample, e.g.
RANGETYPEis the variable the sample is binned in, e.g.
RANGELOWis the lower bound of that range in GeV, e.g.
RANGEHIGHis the upper bound
FILTERdenotes information on additional filters applied
TUNEis the underlying-event tune (e.g.
COMMENTfor additional comments
COMENERGYis the centre-of-mass collision energy, e.g.
GENERATORis the generator used, e.g.
Some details on all these parts are below.
To unify this part CMS uses the following conventions:
GluGluToWWwith respect to
Wplusis used if only W+ is in the sample, and
Tbarif an anti-top is present;
WplusWminusis not used for W-pair production and a top-antitop pair is represented with
2E2Nuis used rather then
The following conventions are applied for the most common particles:
|Particle||Keyword||modifications if needed|
|neutrino||`Nu`||`Nue`, `Numu`, `Nutau`, `Nuebar`,…|
|W||`W`||`Wplus`, `Wminus`, `Wprime`|
|Z (no photon)||`Z`||`Zprime`|
|jet||`Jet`||`Jets` for more than one (inclusive); `1Jet`, `2Jets`, … for exclusive|
|jet||`J`||for decay products, if both quarks and gluons are produced|
This part denotes the variable (if at all) in which the sample is binned. Typical possibilities are
M (inv. mass), as well as the range for this variable. This part of the name may also be used togther with
M to specify the mass of a particle that is used as a parameter (e.g. Higgs mass, Z′ mass, …). Examples are
Pt-100To200for binning in pthat from 100 GeV to 200 GeV
Pt-50if there is only a lower cut on pthat
M-30as a lower inv. mass cut (e.g. in Drell-Yan)
M-160for Higgs mass of 160 GeV
If needed, the variable may be accompanied by specification of the particle in the process on which the cut is applied:
PtW-300if there is a lower cut on the W pthat
This part of the dataset name may be dropped if there is no binning, inv. mass cuts etc.
This part specifies a GEN-level filter for the production, if present. The part is however not standardised; here a few examples:
EMEnriched: some filter — enriching the sample with electrons/photons — is applied
MuEnriched: GEN-level filter on Muons
MuEnrichedPt5: cut on GEN-level muons of 5 GeV
Used only if necessary information could not be put in any of the other fields. e.g. only QCD or only EWK production, special selections etc.
Units are added to integers in
2360GeV and so on.
The generators used are:
|MadGraph **not showered with Pythia6**||`madgraph-herwigpp`, …|
|Alpgen **not showered with Pythia6**||`alpgen-herwig6`, …|
|MC@NLO **not showered with Herwig6**||`mcatnlo-pythia6`, …``|
|POWHEG **not showered with Pythia6**||`powheg-pythia8`, …|
If a specialised decay tool was used, it was appended to the name, e.g. if EvtGen was used after Pythia6, the keyword would be