Hi all, I have added some tcl code for flat PID and neutral killing. Have a look into VubXlnuPhysics.tcl for the configuration of the candidate lists. Flat killing can be turned on using the following variables in your tcl code: ElectronKilling, MuonKilling, KKilling for PID killing (electron, muon, charged Kaons) and NeutralKilling for neutrals/photons. The efficiency for killing is given as the variable value, e.g. set ElectronKilling 0.02 set MuonKilling 0.03 set KKilling 0.05 set NeutralKilling 0.018 This example is from VubXlnu.tcl and it is commented there. I think the recommented value for systematics are 2% (0.02) for electrons, 3% (0.03) for muons. I don't know the value for Kaons. 5% given here is just an example. For neutrals/photons it is 1.8% (0.018). Cheers, Wolfgang ---------------------------------------------------------------------------- Wolfgang Menges Queen Mary, University of London SLAC, MS 35 Mile End Road 2575 Sand Hill Road London, E1 4NS, UK Menlo Park, CA 94025, USA ++44 20 7882 3753 ++1 650 926 8503 [log in to unmask] -----------------------------------------------------------------------------