Ep combination protection reco 76

[rafaellopesdesa]

Similar to #13293, but also in reco part (the reason I am submitting as a different PR is that some of the analysis PR have been already merged).

The W' group reported that the electron Ep combination was returning unphysical values at high energies when the track pT was consistent with 0. We added a protection in the combination code to only use the Ep combination MVA at high energies when the track pT error is smaller than 10 times the track pT. It is a pretty safe cut that removes these badly measured tracks from the determination of the electron energy.

Reference: https://hypernews.cern.ch/HyperNews/CMS/get/physTools/3446/1/1/1/1.html

[cmsbuild]

A new Pull Request was created by @rafaellopesdesa (Rafael Lopes de Sa) for CMSSW_7_6_X.

It involves the following packages:

RecoEgamma/EgammaTools

@cmsbuild, @cvuosalo, @davidlange6, @slava77 can you please review it and eventually sign? Thanks.
@Sam-Harper, @lgray 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]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/11250/console

[cmsbuild]

+1
Tested at: 09ad603
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13301/11250/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13301/11250/summary.html

[slava77]

Rafael,
Please clarify if this will be needed in 74X.
I think no, but wanted to confirm.

[rafaellopesdesa]

No, this part will not be needed in 74x

Thanks,
Rafael

On Tue, Feb 16, 2016, 9:46 PM Slava Krutelyov notifications@github.com
wrote:

Rafael,
Please clarify if this will be needed in 74X.
I think no, but wanted to confirm.

—
Reply to this email directly or view it on GitHub
#13301 (comment).

[slava77]

+1

for #13301 09ad603

• changes in the code are in line with the description: the protection is added on demand; the default behavior of 76X is unchanged. (based on Ep protection at high energy against crazy tracks .. RECO part #13302 jenkins tests, which show no differences, the condition is fairly rare).
• jenkins tests pass and comparisons with baseline show no differences as expected

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_6_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar