Add edm4eic::Jet
#118
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Add edm4eic::Jet
#118
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veprbl
reviewed
Jul 9, 2025
tmadlener
reviewed
Nov 19, 2025
| - uint32_t type // type of jet (0 - kt, 1 - C/A, 2 - anti-kt, ...) | ||
| - float area // jet area | ||
| - float energy // jet energy [GeV] | ||
| - float backgroundEnergy // background energy density * area [GeV] |
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(showing my ignorance here), I suppose the background energy density is rarely used, which is why you go for the product here instead?
| Description: "A reconstructed jet, inspired by the FastJet PseudoJet" | ||
| Author: "D. Anderson" | ||
| Members: | ||
| - uint32_t type // type of jet (0 - kt, 1 - C/A, 2 - anti-kt, ...) |
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I would propose to either
- define
static constvalues that define each type, or - clearly specify where the information of how to interpret this field can be obtained.
For the second part we have defined labels in EDM4hep that define the name of some metadata (Frame) parameter under which this information can be obtained, e.g.: https://github.com/key4hep/EDM4hep/blob/4d2242478347716d05b86c927fa6337764a5af62/edm4hep.yaml#L404
The labels are defined, here:
https://github.com/key4hep/EDM4hep/blob/4d2242478347716d05b86c927fa6337764a5af62/include/edm4hep/Constants.h#L25-L45
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Briefly, what does this PR introduce?
Following the discussion in #88 , this PR introduces
edm4eic::Jet. This type, inspired by thefastjet::PseudoJet, aims to represent jets in our data model in a more adequate way thanedm4eic::ReconstructedParticle.Note these 3 design choices:
edm4eic::ReconstructedParticleare allowed as constituents, which places jet reconstruction in the final stages of reconstruction,jetsallows for either the indication of/connection to sub-jets, seed jets (which may be deployed in background-subtraction algorithms), or background jets (e.g. off-axis cones).What kind of change does this PR introduce?
Please check if this PR fulfills the following:
Does this PR introduce breaking changes? What changes might users need to make to their code?
No.
Does this PR change default behavior?
No.