| Parameter |
Definition |
How it was calculated |
TRootLHEFEvent
|
| Number |
event number |
|
| Nparticles |
number of particles in the event |
hepup.NUP |
| ProcessID |
subprocess code for the event |
hepup.IDPRUP |
| Weight |
weight for the event |
hepup.XWGTUP |
| ScalePDF |
scale in GeV used in the calculation of the PDFs in the event |
hepup.SCALUP |
| CouplingQED |
value of the QED coupling used in the event |
hepup.AQEDUP |
| CouplingQCD |
value of the QCD coupling used in the event |
hepup.AQCDUP |
TRootLHEFParticle
|
| PID |
particle HEP ID number |
hepup.IDUP[number] |
| Status |
particle status code |
hepup.ISTUP[number] |
| Mother1 |
index for the particle first mother |
hepup.MOTHUP[number][0] |
| Mother2 |
index for the particle last mother |
hepup.MOTHUP[number][1] |
| ColorLine1 |
index for the particle color-line |
hepup.ICOLUP[number][0] |
| ColorLine2 |
index for the particle anti-color-line |
hepup.ICOLUP[number][1] |
| Px |
particle momentum vector (x component) |
hepup.PUP[number][0] |
| Py |
particle momentum vector (y component) |
hepup.PUP[number][1] |
| Pz |
particle momentum vector (z component) |
hepup.PUP[number][2] |
| E |
particle energy |
hepup.PUP[number][3] |
| M |
particle mass |
hepup.PUP[number][4] |
| PT |
particle transverse momentum |
|
| Eta |
particle pseudorapidity |
|
| Phi |
particle azimuthal angle |
|
| LifeTime |
particle invariant lifetime (c*tau, distance from production to decay in mm) |
hepup.VTIMUP[number] |
| Spin |
cosine of the angle between the particle spin vector and the decaying particle 3-momentum, specified in the lab frame. |
hepup.SPINUP[number] |
TRootGenEvent
|
| Number |
event number |
hepevt.nevhep |
TRootGenParticle
|
| PID |
particle HEP ID number |
hepevt.idhep[number] |
| Status |
particle status |
hepevt.isthep[number] |
| M1 |
particle 1st mother |
hepevt.jmohep[number][0] - 1 |
| M2 |
particle 2nd mother |
hepevt.jmohep[number][1] - 1 |
| D1 |
particle 1st daughter |
hepevt.jdahep[number][0] - 1 |
| D2 |
particle 2nd daughter |
hepevt.jdahep[number][1] - 1 |
| E |
particle energy |
hepevt.phep[number][3] |
| Px |
particle momentum vector (x component) |
hepevt.phep[number][0] |
| Py |
particle momentum vector (y component) |
hepevt.phep[number][1] |
| Pz |
particle momentum vector (z component) |
hepevt.phep[number][2] |
| PT |
particle transverse momentum |
|
| Eta |
particle pseudorapidity |
|
| Phi |
particle azimuthal angle |
|
| T |
particle vertex position (t component) |
hepevt.vhep[number][3] |
| X |
particle vertex position (x component) |
hepevt.vhep[number][0] |
| Y |
particle vertex position (y component) |
hepevt.vhep[number][1] |
| Z |
particle vertex position (z component) |
hepevt.vhep[number][2] |
TRootEvent
|
| Number |
event number |
|
| Trigger |
trigger word |
|
TRootMissingET
|
| MET |
mising transverse energy |
|
| Phi |
mising energy azimuthal angle |
|
TRootPhoton
|
| PT |
photon transverse momentum |
|
| Eta |
photon pseudorapidity |
|
| Phi |
photon azimuthal angle |
|
| EhadOverEem |
ratio of the hadronic versus electromagnetic energy deposited in the calorimeter |
|
TRootElectron
|
| PT |
electron transverse momentum |
|
| Eta |
electron pseudorapidity |
|
| Phi |
electron azimuthal angle |
|
| Charge |
electron charge |
|
| Ntrk |
number of tracks associated with the electron |
|
| EhadOverEem |
ratio of the hadronic versus electromagnetic energy deposited in the calorimeter |
|
TRootMuon
|
| PT |
muon transverse momentum |
|
| Eta |
muon pseudorapidity |
|
| Phi |
muon azimuthal angle |
|
| Charge |
muon charge |
|
| Ntrk |
number of tracks associated with the muon |
|
| PTiso |
sum of tracks transverse momentum within a cone of radius R=0.4 centered on the muon (excluding the muon itself) |
|
| ETiso |
ratio of ET in a 3x3 calorimeter cells array around the muon (including the muon's cell) to the muon PT |
|
| JetIndex |
index of the closest jet |
|
TRootTau
|
| PT |
tau transverse momentum |
|
| Eta |
tau pseudorapidity |
|
| Phi |
tau azimuthal angle |
|
| Charge |
tau charge |
|
| Ntrk |
number of charged tracks associated with the tau |
|
| EhadOverEem |
ratio of the hadronic versus electromagnetic energy deposited in the calorimeter |
|
TRootJet
|
| PT |
jet transverse momentum |
|
| Eta |
jet pseudorapidity |
|
| Phi |
jet azimuthal angle |
|
| Mass |
jet invariant mass |
|
| Ntrk |
number of tracks associated with the jet |
|
| BTag |
1 or 2 for a jet that has been tagged as containing a heavy quark |
|
| EhadOverEem |
ratio of the hadronic versus electromagnetic energy deposited in the calorimeter |
|
| Index |
jet index in the LHC Olympics file |
|