Bugfix: Fake muon tracks become charged hadrons in PF

[bachtis]

This fixes tail events that appeared in 80X. Those fake tracks we have seen before but they were appearing in less pure iterations for which we applied Dpt/pt cuts

Actions taken:
+Add a very loose Dpt/pt cut <20 in other iterations
+Cut tracks that are not belonging to muons but are not high purity

THis should only affect events in tails

[cmsbuild]

A new Pull Request was created by @bachtis (Michalis Bachtis) for CMSSW_8_0_X.

It involves the following packages:

RecoParticleFlow/PFProducer

@cmsbuild, @cvuosalo, @slava77, @davidlange6 can you please review it and eventually sign? Thanks.
@mmarionncern, @lgray, @rafaellopesdesa, @cbernet 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

[slava77]

we need a PR in 81X.
This isn't going to go anywhere in 80X.
(at leas on t time scale of 3-6 months)

[slava77]

[Aug 24: remove -1 ]
we can come back to this if some major reprocessing happens

[davidlange6]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/14712/console

[cmsbuild]

-1

Tested at: 6c7a639

You can see the results of the tests here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14669/14712/summary.html

I found follow errors while testing this PR

Failed tests: RelVals

• RelVals:

When I ran the RelVals I found an error in the following worklfows:
1000.0 step1

DAS Error

[cvuosalo]

@cmsbuild please test
Try again after DAS error

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/14717/console

[cmsbuild]

+1
Tested at: 6c7a639
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14669/14717/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-14669/14717/summary.html

[slava77]

+1

for #14669 6c7a639

• the same change in track selection in PF reco as in Bugfix: Fake muon tracks become charged hadrons in PF (81X version of #14669) #14670 (the same commit ID)
• jenkins tests pass and comparisons with baseline show similar level of changes as observed in Bugfix: Fake muon tracks become charged hadrons in PF (81X version of #14669) #14670 . Refer to that PR for details.

I will still add a "hold", although this is just becoming a technical note.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @smuzaffar

[slava77]

hold

to denote that this PR is to be merged only once a rereco release is to be made

[cmsbuild]

Pull request has been put on hold by @slava77
They need to issue an unhold command to remove the hold state or L1 can unhold it for all