restrict NHF-cut to eta<2.4 to prevent it from being applied in the HF

[kirschen]

JetID-fix for 2016 datataking

[cmsbuild]

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

It involves the following packages:

HLTrigger/JetMET

@Martin-Grunewald, @perrotta, @cmsbuild, @fwyzard, @davidlange6 can you please review it and eventually sign? Thanks.
@Martin-Grunewald this is something you requested to watch as well.
@slava77, @Degano, @smuzaffar you are the release manager for this.

cms-bot commands are list here #13028

[Martin-Grunewald]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/12411/console

[Martin-Grunewald]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_1_X IBs after it passes the integration tests. This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[cmsbuild]

+1
Tested at: 8b11c56
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14095/12411/summary.html

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:
b1d5222
c008fce
d1095bd
9cc08c4
You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14095/12411/git-log-recent-commits
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14095/12411/git-merge-result

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14095/12411/summary.html

[davidlange6]

Hi @kirschen - I don't really follow this change. What is the difference with respect to just disabling the nhf cut completely?

[kirschen]

Hi @davidlange6 , this change was discussed in
https://its.cern.ch/jira/browse/CMSHLT-742
and a separate mail thread involving involved parties/trigger contacts.

The NHF-cut is still to be applied in the tracker-covered region. However, if applied in HF it is doing harm after PF-reconstruction changes, because the "usual" PF-HF jet has close to 100% neutral hadron fraction. That is why it was dropped from offline JetId-recommendations https://twiki.cern.ch/twiki/bin/viewauth/CMS/JetID#Recommendations_for_13_TeV_data and this just propagates this change to the HLT.

[davidlange6]

+1

ah - NHF does not stand for what I thought it did.. Thx.