cmssw: phase2 PV sorting is not using HGCAL inputs (only the barrel and HF contribute to ak4CaloJetsForTrk)
this is a follow up to #31743 https://github.com/cms-sw/cmssw/issues/31743#issuecomment-711253630
CaloJets (ak4CaloJetsForTrk made out of caloTowerForTrk) are used in PV sorting and none of the HGCAL inputs are used in the phase-2 setup.
The jets are used to assign (otherwise unattached to a vertex due to displacement) tracks to a vertex if there is some alignment of the track with a calojet axis.
It’s still probably making it for just a suboptimal performance rather than a bug for vertexing in phase2.
Still, some assessment and possible resolution is needed.
It could be that the calojets should not be used this way at all in phase-2 high-pileup.
About this issue
- Original URL
- State: open
- Created 4 years ago
- Comments: 26 (26 by maintainers)
type tracking
Hi @fwyzard , for sorting of PVs from ‘full’ tracks, I think for HLT Phase-2 we are currently doing the same as Offline, and that uses a more sophisticated method. One reference is this (but others might have better ones…): https://indico.cern.ch/event/369417/contributions/1788757/attachments/734933/1008272/pv-sorting-xpog.pdf