Opened 10 years ago
Last modified 10 years ago
#291 new How to
Eflow branches
| Reported by: | jingren2004 | Owned by: | |
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | Delphes code | Version: | Delphes 3 |
| Keywords: | eflow, jet reconstruction | Cc: | jingren2004@… |
Description
Hi,
I have one question about the use of eflow branches in jet reconstruction. In the latest Delphes-3.1.2, compared with the old version, it seems the following two options are absent,
add Branch Calorimeter/eflowTowers EFlowTower Tower
add Branch MuonMomentumSmearing/muons EFlowMuon Muon
while another two new branches are present,
add Branch Calorimeter/eflowPhotons EFlowPhoton Tower
add Branch Calorimeter/eflowNeutralHadrons EFlowNeutralHadron Tower
For fastjet reconstruction, am I supposed to use the two new eflow branches instead in root file produced by Delphes-3.1.2?
Thanks!
Jing
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Hi Jing,
do you mean you are running FastJet outside of Delphes?
In any case, if you want to use particle-flow object you should use
the EFlowMerger/eflow collection (which is indeed a merge of tracks, photons and neutral hadrons)
If on the other hand you want to use pure Calorimeter objects, you can simply use Calorimeter/towers.
By default, in the CMS card for instance, the input collection for the FastJetFinder is EFlowMerger/eflow
You can have a look at examples/Example3.C.
Michele