ROOT ntuple producer for the search of central exclusive two-photon induced events at CMS

IMPORTANT NOTE

This branch requires a version of CMSSW from CMSSW_9_4_0 on.

Electron/photon ID

The Egamma POG recommendations for multivariate electron and photon identification 2017+ data analysis is, as listed here:

cmsrel CMSSW_9_4_0
cd CMSSW_9_4_0/src
cmsenv
git cms-merge-topic guitargeek:ElectronID_MVA2017_940pre3 # electron identification
git cms-merge-topic lsoffi:CMSSW_9_4_0_pre3_TnP # photon identification
scram b -j 8
# Add the area containing the MVA weights (from cms-data, to appear in `external`).
# Note: the `external` area appears after `scram build` is run at least once, as above
cd $CMSSW_BASE/external
# below, you may have a different architecture, this is just one example from lxplus
cd slc6_amd64_gcc630/
git clone https://github.com/lsoffi/RecoEgamma-PhotonIdentification.git data/RecoEgamma/PhotonIdentification/data
cd data/RecoEgamma/PhotonIdentification/data
git checkout CMSSW_9_4_0_pre3_TnP
cd $CMSSW_BASE/external
cd slc6_amd64_gcc630/
git clone https://github.com/lsoffi/RecoEgamma-ElectronIdentification.git data/RecoEgamma/ElectronIdentification/data
cd data/RecoEgamma/ElectronIdentification/data
git checkout CMSSW_9_4_0_pre3_TnP
# Go back to the src/
cd $CMSSW_BASE/src

Analysis package

Once the Egamma MVA ID packages are retrieved, clone this repository in your $CMSSW_BASE/src environment:

git clone git@github.com:cms-analysis/DiffractiveForwardAnalysis.git

If the authentication fails in any of this or previous stage, it might be that you did not map your lxplus' public key to your GitHub account. In that case, follow this procedure.