The Zprime ntuple

In the following, are denoted at generation(MC) level:

• Z' : the particle with Type = 32 in Pythia history
• Quark : the last particle with 0<Type<6 before Z' in Pythia history.
• Antiquark : the last particle with -6<Type<0 before Z' in Pythia history.
• Electron : the first particle with Type = 11 in Pythia history.
• Positron : the first particle with Type = -11 in Pythia history.
• Radiated electron : the last particle,daughter of electron, with Type = 11 in Pythia history.
• Radiated positron : the last particle,daughter of positron, with Type = -11 in Pythia history.
• A photon : particle,daughter of electron or positron, with Type =22 in Pythia history
  

And at the reconstruction level:

• Electron : the most energetic electron candidate.
• Positron : the most energetic positron candidate.
• Z' : the system (electron,positron)
  

The CBNT mother ntuples (copied from the Martina castor area) can be found on castor: /castor/cern.ch/user/t/trocme/exotics/DC1
The derived ntuples can be found on lxplus cluster:ls ~trocme/Atlas/Exotics/FullSim/NtpCreation/Ntuples

Name	MC truth / Reconstructed	Description
tGen_cosq	MC	Angle between electron and quark
tGen_cosZ	MC	Angle between electron and beam axis, taking the Z' direction (the true one).
tGen_pEq_labF	MC	4 momentum of quark in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_pEaq_labF	MC	4 momentum of antiquark in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_flavq	MC	Pythia quark/antiquark type - [0] -> quark ; [1] -> antiquark
tGen_pEZ_labF	MC	4 momentum of Z' in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E NB : Redundant variable (tGen_pEq_labF + tGen_pEaq_labF = tGen_pEZ_labF )
tGen_pzq_ZF	MC	pz of quark in Z' frane
tGen_massZ	MC	Mass of the Z' NB : Redundant variable ( tGen_massZ = tGen_pEZ_labF[3]**2 - tGen_pEZ_labF[0]**2 - .......)
tGen_pEele_labF	MC	4 momentum of electron in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_etaele	MC	Eta of electron NB : Redundant variable ( cf tGen_pEele_labF)
tGen_pEpos_labF	MC	4 momentum of positron in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_etapos	MC	Eta of positron NB : Redundant variable ( cf tGen_pEpos_labF)
tGen_pEeleRad_labF	MC	4 momentum of radiated electron in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_pEposRad_labF	MC	4 momentum of radiated positron in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_Nphot	MC	Number of radiated photons
tGen_pEphot_labF	MC	Sum of 4 momentum of radiated photons - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tGen_Y	MC	Rapidity of Z' NB : Redundant variable ( cf tGen_pEZ_labF)
tRec_pEeleC_labF	Reconstructed	Recalibrated 4 momentum of electron in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tRec_etaeleC	Reconstructed	Eta of electron NB : Redundant variable ( cf tRec_pEeleC_labF)
tRec_pEposC_labF	Reconstructed	Recalibrated 4 momentum of positron in lab frame - [0] -> px ; [1] -> py ; [2] -> pz ; [3] -> E
tRec_etaposC	Reconstructed	Eta of positron NB : Redundant variable ( cf tRec_pEposC_labF)
tRec_cosZ	Reconstructed	Angle between electron and beam axis, taking the Z' direction (the reconstructed one).
tRec_mass	Reconstructed	The mass of Z' NB : Redundant variable ( cf tRec_pEele_labF and tRec_pEpos_labF)
tRec_Y	Reconstructed	Rapidity of Z' NB : Redundant variable ( cf tRec_pEele_labF and tRec_pEpos_labF)
tRec_eps	Reconstruted	Probablity to be wrong when assuming the quark direction to be the same as the Z' direction. Directly deduced from tRec_Y by a parabolic fit
tRec_eps2	Reconstruted	Same as tRec_eps but with a different parabolic fit
tRec_epsBinned	Reconstruted	Probablity to be wrong when assuming the quark direction to be the same as the Z' direction. Directly deduced from tRec_Y with binned estimation of eps vs y.
tRec_alpha	Reconstructed	Angle between l and p candidates in transverse plane
tRec_sel	Reconstructed	Selection flag : = 1-> selected ;                         = 0 -> rejected because :  no (2 identified electrons)                         = -1 -> rejected because : (2 identified electrons) but no opposite charge                         = -2 -> rejected because : (2 identified electrons of opposite charges) but not back to back