Root Tree Description

Description of all classes used to store output data (momentum units are GeV, position units are mm).

Parameter	Definition	How it was calculated
class Event
Number	event number
ReadTime	read time
ProcTime	processing time
class LHCOEvent
Event	LHCOEvent inherits all Event parameters
Trigger	trigger word
class LHEFEvent
Event	LHEFEvent inherits all Event parameters
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
AlphaQED	value of the QED coupling used in the event	hepup.AQEDUP
AlphaQCD	value of the QCD coupling used in the event	hepup.AQCDUP
class LHEFWeight
ID	weight ID
Weight	weight value
class HepMCEvent
Event	HepMCEvent inherits all Event parameters
ProcessID	unique signal process id	signal_process_id()
MPI	number of multi parton interactions	mpi ()
Weight	weight for the event
Scale	energy scale, see hep-ph/0109068	event_scale()
AlphaQED	QED coupling, see hep-ph/0109068	alphaQED()
AlphaQCD	QCD coupling, see hep-ph/0109068	alphaQCD()
ID1	flavour code of first parton	pdf_info()->id1()
ID2	flavour code of second parton	pdf_info()->id2()
X1	fraction of beam momentum carried by first parton ("beam side")	pdf_info()->x1()
X2	fraction of beam momentum carried by second parton ("target side")	pdf_info()->x2()
ScalePDF	Q-scale used in evaluation of PDF's (in GeV)	pdf_info()->scalePDF()
PDF1	PDF (id1, x1, Q)	pdf_info()->pdf1()
PDF2	PDF (id2, x2, Q)	pdf_info()->pdf2()
class GenParticle
PID	particle HEP ID number	hepevt.idhep[number]
Status	particle status	hepevt.isthep[number]
IsPU	0 or 1 for particles from pile-up interactions
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 last daughter	hepevt.jdahep[number][1] - 1
Charge	particle charge
Mass	particle mass
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]
P	particle momentum
PT	particle transverse momentum
Eta	particle pseudorapidity
Phi	particle azimuthal angle
Rapidity	particle rapidity
CtgTheta	particle cotangent of theta
D0	particle transverse impact parameter
DZ	particle longitudinal impact parameter
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]
class Vertex
T	vertex position (t component)
X	vertex position (x component)
Y	vertex position (y component)
Z	vertex position (z component)
ErrorT	vertex position error (t component)
ErrorX	vertex position error (x component)
ErrorY	vertex position error (y component)
ErrorZ	vertex position error (z component)
Index	vertex index
NDF	number of degrees of freedom
Sigma	vertex position (z component) error
SumPT2	sum pt^2 of tracks attached to the vertex
GenSumPT2	sum pt^2 of gen tracks attached to the vertex
GenDeltaZ	distance in z to closest generated vertex
BTVSumPT2	sum pt^2 of tracks attached to the secondary vertex
Constituents	references to constituents
class MissingET
MET	mising transverse energy
Eta	mising energy pseudorapidity
Phi	mising energy azimuthal angle
class ScalarHT
HT	scalar sum of transverse momenta
class Rho
Rho	rho energy density
Edges[2]	pseudorapidity range edges
class Weight
Weight	weight for the event
class Photon
PT	photon transverse momentum
Eta	photon pseudorapidity
Phi	photon azimuthal angle
E	photon energy
T	particle arrival time of flight
EhadOverEem	ratio of the hadronic versus electromagnetic energy deposited in the calorimeter
Particles	references to generated particles
IsolationVar	isolation variable
IsolationVarRhoCorr	isolation variable
SumPtCharged	isolation variable
SumPtNeutral	isolation variable
SumPtChargedPU	isolation variable
SumPt	isolation variable
class Electron
PT	electron transverse momentum
Eta	electron pseudorapidity
Phi	electron azimuthal angle
T	particle arrival time of flight
Charge	electron charge
EhadOverEem	ratio of the hadronic versus electromagnetic energy deposited in the calorimeter
Particle	reference to generated particle
IsolationVar	isolation variable
IsolationVarRhoCorr	isolation variable
SumPtCharged	isolation variable
SumPtNeutral	isolation variable
SumPtChargedPU	isolation variable
SumPt	isolation variable
class Muon
PT	muon transverse momentum
Eta	muon pseudorapidity
Phi	muon azimuthal angle
T	particle arrival time of flight
Charge	muon charge
Particle	reference to generated particle
IsolationVar	isolation variable
IsolationVarRhoCorr	isolation variable
SumPtCharged	isolation variable
SumPtNeutral	isolation variable
SumPtChargedPU	isolation variable
SumPt	isolation variable
class Jet
PT	jet transverse momentum
Eta	jet pseudorapidity
Phi	jet azimuthal angle
Mass	jet invariant mass
Flavor	jet flavor
FlavorAlgo	jet flavor
FlavorPhys	jet flavor
BTag	0 or 1 for a jet that has been tagged as containing a heavy quark
BTagAlgo	0 or 1 for a jet that has been tagged as containing a heavy quark
BTagPhys	0 or 1 for a jet that has been tagged as containing a heavy quark
TauTag	0 or 1 for a jet that has been tagged as a tau
Charge	tau charge
EhadOverEem	ratio of the hadronic versus electromagnetic energy deposited in the calorimeter
NCharged	number of charged constituents
NNeutrals	number of neutral constituents
Beta	(sum pt of charged pile-up constituents)/(sum pt of charged constituents)
BetaStar	(sum pt of charged constituents coming from hard interaction)/(sum pt of charged constituents)
MeanSqDeltaR	average distance (squared) between constituent and jet weighted by pt (squared) of constituent
PTD	average pt between constituent and jet weighted by pt of constituent
FracPt[5]	(sum pt of constituents within a ring 0.1*i < DeltaR < 0.1*(i+1))/(sum pt of constituents)
Tau[5]	N-subjettiness
TrimmedP4[5]	first entry (i = 0) is the total Trimmed Jet 4-momenta and from i = 1 to 4 are the trimmed subjets 4-momenta
PrunedP4[5]	first entry (i = 0) is the total Pruned Jet 4-momenta and from i = 1 to 4 are the pruned subjets 4-momenta
SoftDroppedP4[5]	first entry (i = 0) is the total SoftDropped Jet 4-momenta and from i = 1 to 4 are the pruned subjets 4-momenta
NSubJetsTrimmed	number of subjets trimmed
NSubJetsPruned	number of subjets pruned
NSubJetsSoftDropped	number of subjets soft-dropped
Constituents	references to constituents
Particles	references to generated particles
class Track
PID	HEP ID number
Charge	track charge
P	track momentum
PT	track transverse momentum
Eta	track pseudorapidity
Phi	track azimuthal angle
CtgTheta	track cotangent of theta
EtaOuter	track pseudorapidity at the tracker edge
PhiOuter	track azimuthal angle at the tracker edge
T	track vertex position (t component)
X	track vertex position (x component)
Y	track vertex position (y component)
Z	track vertex position (z component)
TOuter	track position (t component) at the tracker edge
XOuter	track position (x component) at the tracker edge
YOuter	track position (y component) at the tracker edge
ZOuter	track position (z component) at the tracker edge
Xd	X coordinate of point of closest approach to vertex
Yd	Y coordinate of point of closest approach to vertex
Zd	Z coordinate of point of closest approach to vertex
L	track path length
D0	track transverse impact parameter
DZ	track longitudinal impact parameter
ErrorP	track momentum error
ErrorPT	track transverse momentum error
ErrorPhi	track azimuthal angle error
ErrorCtgTheta	track cotangent of theta error
ErrorT	time measurement error
ErrorD0	track transverse impact parameter error
ErrorDZ	track longitudinal impact parameter error
Particle	reference to generated particle
VertexIndex	reference to vertex
class Tower
ET	calorimeter tower transverse energy
Eta	calorimeter tower pseudorapidity
Phi	calorimeter tower azimuthal angle
E	calorimeter tower energy
T	ecal deposit time, averaged by sqrt(EM energy) over all particles, not smeared
NTimeHits	number of hits contributing to time measurement
Eem	calorimeter tower electromagnetic energy
Ehad	calorimeter tower hadronic energy
Edges[4]	calorimeter tower edges
Particles	references to generated particles
class HectorHit
E	reconstructed energy [GeV]
Tx	angle of the momentum in the horizontal (x,z) plane [urad]
Ty	angle of the momentum in the verical (y,z) plane [urad]
T	time of flight to the detector [s]
X	horizontal distance to the beam [um]
Y	vertical distance to the beam [um]
S	distance to the interaction point [m]
Particle	reference to generated particle