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Save beamWidthYerr in covariance matrix #2
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At the moment the covariance matrix only contains beamWidthXerr
https://github.com/MilanoBicocca-pix/cmssw/blob/CMSSW_7_5_X_beamspot_workflow_riccardo/RecoVertex/BeamSpotProducer/src/PVFitter.cc#L304
and, in the following
new: https://github.com/MilanoBicocca-pix/cmssw/blob/CMSSW_7_5_X_beamspot_workflow_riccardo/RecoVertex/BeamSpotProducer/python/workflow/objects/BeamSpotObj.py#L106
old: https://github.com/MilanoBicocca-pix/cmssw/blob/CMSSW_7_5_X_Minuit2/RecoVertex/BeamSpotProducer/scripts/CommonMethods.py#L419
we assume that beamWidthYerr == beamWidthYerr (which is fair, but in principle not entirely true).
Should we save beamWidthYerr as well? Code wise is trivial, but it may imply compatibility issues.
@sarafiorendi @menasce @rmanzoni @gennai
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