Track based electron isolation

[Declan Millar]

Hi,

I'm trying to emulate the ATLAS dilepton analysis in ​arXiv:1604.05538v2, which uses a track based isolation for the electrons. Thus, I am attempting to change the IsolationInputArray to TrackMerger/tracks from EFlowMerger/eflow in ElectronIsolation. i.e:

module Isolation ElectronIsolation {

set CandidateInputArray ElectronEfficiency/electrons
set IsolationInputArray TrackMerger/tracks
# set IsolationInputArray EFlowMerger/eflow
set OutputArray electrons
set DeltaRMax 0.3
set PTMin 0.5
set PTRatioMax 0.12

}

However, changing the input array in this manner removes all electrons from the events. Making the same change in the Muon isolation appears to give the desired results (more muons survive the isolation than when using eflow).

Have I made a mistake in the implementation?

Many thanks in advance,
Declan

[Michele Selvaggi]

Can you try adding

set DeltaRMin 0.01
set UseMiniCone true

this should force the electron to excluded from the isolation calculation.