image/svg+xml reader electrons propagated stable particles muons ε, σ ε, σ calorimeterand energy flow unique object finder electrons photons jets muons MET LHEF HepMC ProMC FastJet particle propagator pile-up merger Pile-upfile ROOT Analysismacros Eventdisplay LHCO merger pile-up subtractors b-, τ-tagging energy scale isolation StdHEP(XDR) Configfile photons towers and tracks