Adapt PF algorithm for high pT jet substructure #4668
Conversation
|
A new Pull Request was created by @ahinzmann for CMSSW_7_2_X. Adapt PF algorithm for high pT jet substructure It involves the following packages: RecoParticleFlow/PFProducer @nclopezo, @cmsbuild, @Degano, @StoyanStoynev, @slava77 can you please review it and eventually sign? Thanks. |
|
Hello, this is a change in PFAlgo after the GedPhotons and GedElectrons are already built and selected. So we do no expect it to affect primary electrons and photons. It could have only a little effect on the isolation. We will give a closer look to isolation in the next relval validation. |
| @@ -2656,37 +2663,78 @@ void PFAlgo::processBlock( const reco::PFBlockRef& blockref, | |||
| rawhcalEnergy.push_back(totalHcal); | |||
| pivotalClusterRef.push_back(maxEcalRef); | |||
| iPivotal.push_back(maxiEcal); | |||
There was a problem hiding this comment.
This part of the code (all push_backs) is essentially repeated below 6 times. Please make the code more "modular" or restructure it (don't repeat it).
|
bot, wake up, see the new commits |
|
Hi, |
|
Hi, I fixed the bug I introduced after the comments from Stoyan Stoynev. I can now claim again what I had in my presentation. No change in jet response/resolution. No change in MET resolution and tails. Cheers,
|
|
bot, please take this version. |
|
ok, I will check this one |
|
This pull request is fully signed and it will be integrated in one of the next CMSSW_7_2_X IBs unless changes (tests are also fine). |
Adapt PF algorithm for high pT jet substructure
Change in PFAlgo to fix the jet mass reconstruction of highly boosted W bosons.
The PFAlgo creates merged photons and neutral hadrons from an excess of energy in ECAL and HCAL.
With this fix, these neutrals are split up into ECAL clusters to enable jet mass measurement.
The change is only applied to merged neutrals containing >=2 ECAL clusters with E>50 GeV and has therefore no effect on low energy reconstruction.
This change increases slightly the number of high momentum neutral particles in the event, but has no impact on jet energy fractions or jet energy scale/resolution. Only jet mass scale/resolution is improved.
Presentations at xPOG and JetMET
https://indico.cern.ch/event/320480/contribution/8
https://indico.cern.ch/event/322766/contribution/5