GenParticle

class coffea.nanoevents.methods.nanoaod.GenParticle[source]

Bases: PtEtaPhiMLorentzVector, NanoCollection

NanoAOD generator-level particle object, including parent and child self-references

Parent and child self-references are constructed from the genPartIdxMother column, where for each entry, the mother entry index is recorded, or -1 if no mother exists.

Attributes Summary

`FLAGS`	bit-packed statusFlags interpretations.
`children`
`distinctChildren`
`distinctChildrenDeep`	Accessor to distinct child particles with different PDG id, or last ones in the chain
`distinctParent`
`parent`

Methods Summary

hasFlags(*flags)

Check if one or more status flags are set

Attributes Documentation

FLAGS = ['isPrompt', 'isDecayedLeptonHadron', 'isTauDecayProduct', 'isPromptTauDecayProduct', 'isDirectTauDecayProduct', 'isDirectPromptTauDecayProduct', 'isDirectHadronDecayProduct', 'isHardProcess', 'fromHardProcess', 'isHardProcessTauDecayProduct', 'isDirectHardProcessTauDecayProduct', 'fromHardProcessBeforeFSR', 'isFirstCopy', 'isLastCopy', 'isLastCopyBeforeFSR']: bit-packed statusFlags interpretations. Use GenParticle.hasFlags to query

children

distinctChildren

distinctChildrenDeep: Accessor to distinct child particles with different PDG id, or last ones in the chain

distinctParent

parent

Methods Documentation

hasFlags(*flags)[source]

Check if one or more status flags are set

Parameters:: flags (str or list) – A list of flags that are required to be set true. If the first argument is a list, it is expanded and subsequent arguments ignored. Possible flags are enumerated in the FLAGS attribute

Returns a boolean array