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understand fraction of merged pixel clusters in Phase-2 dense jet cores #8

Open mmusich opened 1 year ago

mmusich commented 1 year ago

In view of assessing if we still need to support a "jetCore"-like iteration for phase-2, it would be interesting to know what is the fraction of merged IT clusters in dense jet events in the phase-2 tracker setup, given the reduced pixel cell pitch. SimHit matching might be desireable. As a first pass one could look at how the closest cluster distance looks like as a function of the distance from the jet axis.

mmusich commented 1 year ago

Hi @sroychow @emiglior any feedback on this?

emiglior commented 1 year ago

There is a PhD student in Torino who is (just) starting to look at this

mmusich commented 1 year ago

There is a PhD student in Torino who is (just) starting to look at this

good to know. We were about to start looking at it in the POG, but if someone in DPG is looking as well, that's better.

mmusich commented 8 months ago

First report at Tracker DPG meeting 24.01.2024

mmusich commented 8 months ago

@emiglior concerning running JetCore in phase-2, one should figure out how to "fix" this:

https://github.com/cms-sw/cmssw/blob/bb525104a7ddb93685f8ced6fed1ab793b2d2103/RecoLocalTracker/SubCollectionProducers/src/JetCoreClusterSplitter.cc#L166-L167

as that is then used in the template algo

https://github.com/cms-sw/cmssw/blob/bb525104a7ddb93685f8ced6fed1ab793b2d2103/RecoLocalTracker/SiPixelRecHits/src/PixelCPETemplateReco.cc#L423