Jets for 81x MiniAOD

[rappoccio]

Here are the changes for Jets for 81x MiniAOD. The changes are:

• We are "switching" from CHS to PUPPI in AK8 jets. Previously we stored CHS jets and matched PUPPI to those objects, storing values in user floats. Now we store PUPPI jets and store CHS values in user floats instead.
• We dropped the CHS subjets, saving about 0.5% of the event size.
• We added a single b-tagging discriminator to the subjets.

Tests ran: runTheMatrix.py -l limited -i all -j 10, scram b runtests

[cmsbuild]

A new Pull Request was created by @rappoccio for CMSSW_8_1_X.

It involves the following packages:

PhysicsTools/PatAlgos

@cmsbuild, @cvuosalo, @slava77, @davidlange6 can you please review it and eventually sign? Thanks.
@TaiSakuma, @imarches, @ahinzmann, @acaudron, @gpetruc, @mmarionncern, @jdolen, @nhanvtran, @JyothsnaKomaragiri, @schoef, @ferencek, @mverzett, @mariadalfonso, @pvmulder this is something you requested to watch as well.
@slava77, @smuzaffar you are the release manager for this.

cms-bot commands are list here #13028

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/14487/console

[cmsbuild]

+1
Tested at: 2667ff2
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-15437/14487/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-15437/14487/summary.html

[slava77]

Here are some plots to go with the changes, based on T1tttt with mglu= 1.5TeV mLSP=100 GeV; from RECO of RelVal 810pre9

jet raw PT is slightly lower

but response after correction is essentially the same

Jet mass response is lower ... I didn't find a "corrected" mass plot

PLots with prunedMass, softdrop and tau* are empty.
Unclear if DQM needs an update or the plots just migrated to different category

On the technical side:

• AK8CHS and upstream and downstream modules in PAT are gone (36 of them);
• AK8Puppi jets and related modules were added (27 total)
• event content doesn't have patJets_slimmedJetsAK8PFCHSSoftDropPacked_SubJets anymore (as expected), which is about 0.5%

Please check and confirm that the DQM plots behavior is OK. (I suspect something is missing)

[slava77]

@rappoccio @schoef @jdolen @ahinzmann
Do you intend to make the same change for 2016 data rereco?
If so, a PR for 80X is needed.

[slava77]

I'm waiting for feedback on #15437 (comment)
before I can sign.

[ahinzmann]

we are not planning to backport to 80 (since 80 contains both CHS and PUPPI anyways already).
For the DQM plots @rappoccio will comment.

[rappoccio]

Hi, Folks,

Sorry for the delay, I was on holiday.

We will indeed probably not backport to 80x unless there is a strong desire. About the DQM, indeed I did not change those, I will need to do that. Give me a few hours.

Cheers,
Sal

[slava77]

Hi Sal,

a few hours later there is no update yet.
Please clarify on the timeline.
It would be better to make the change in time for pre11 (a PR update today-ish with a chance to check/fix left)

[rappoccio]

Yes, sorry, I will try my best to get this done today.

[slava77]

@rappoccio
you mentioned yesterday that some fixes were still in line.
Please clarify if/when they are coming.

[cmsbuild]

Pull request #15437 was updated. @cvuosalo, @dmitrijus, @cmsbuild, @montjj, @slava77, @vanbesien, @davidlange6 can you please check and sign again.

[slava77]

@rappoccio
please leave a note to clarify that all changes from you are included
Thanks.

[cmsbuild]

Pull request #15437 was updated. @cvuosalo, @dmitrijus, @cmsbuild, @montjj, @slava77, @vanbesien, @davidlange6 can you please check and sign again.

[rappoccio]

Right now! Found the problem. The plots are as follows:

tau21.pdf
softdropmass.pdf
ptuncorr.pdf
prunedmass.pdf

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/14762/console

[cmsbuild]

+1
Tested at: dc8a0bb
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-15437/14762/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-15437/14762/summary.html

[slava77]

+1

for #15437 dc8a0bb

• changes since 2667ff2 are as expected, based on the SMS relval test:
  • reco quantities are unchanged
  • DQM plots are recovered: SoftDrop, Pruned, and tauX.over.tauY are now filled and appear to be in reasonable agreement
• jenkins tests pass