Experimental MC20 Event (`exp_mc20`)

The exp_mc20 package provides the event and particle classes for the experimental MC20 ATLAS dataset. Import with:

from AnalysisG.events.exp_mc20 import ExpMC20

ExpMC20

ExpMC20 is an EventTemplate subclass wrapping <exp_mc20/event.h>.

Particle collections:

Attribute	Description
`Tops`	`list` — truth top quarks.
`TruthChildren`	`list` — truth-level top decay products.
`PhysicsTruth`	`list` — truth-level physics objects (jets/leptons/photons).
`Jets`	`list` — reconstructed jets.
`Leptons`	`list` — reconstructed leptons.
`PhysicsDetector`	`list` — detector-level physics objects.
`Detector`	`list` — full detector-level collection.

Scalar fields:

Property	Type	Description
`event_number`	`int`	Unique 64-bit event identifier.
`met_sum`	`float`	Scalar sum of all transverse energies [GeV].
`met`	`float`	Missing transverse energy [GeV].
`phi`	`float`	MET azimuthal angle [rad].
`mu`	`float`	Average pile-up interactions per bunch crossing.

Truth top quark with barcode tracking.

Attribute	Type	Description
`barcode`	`int`	MC generator particle barcode.
`status`	`int`	MC generator status code.

Truth-level top decay product.

Attribute	Type	Description
`barcode`	`int`	MC generator particle barcode.
`status`	`int`	MC generator status code.

Unified detector / truth physics objects (jets, leptons, photons).

Attribute	Type	Description
`parton_label`	`int`	Parton-level flavour label.
`cone_label`	`int`	Cone-based flavour label.
`is_jet`	`bool`	Object is classified as a jet.
`is_lepton`	`bool`	Object is classified as a lepton.
`is_photon`	`bool`	Object is classified as a photon.

Reconstructed electron with quality flags.

Attribute	Type	Description
`d0`	`float`	Transverse impact parameter [mm].
`delta_z0`	`float`	Longitudinal impact parameter [mm].
`true_type`	`int`	MC truth type.
`true_origin`	`int`	MC truth origin.
`is_tight`	`bool`	Passes the tight electron selection.

Reconstructed muon with quality flags.

Attribute	Type	Description
`d0`	`float`	Transverse impact parameter [mm].
`delta_z0`	`float`	Longitudinal impact parameter [mm].
`true_type`	`int`	MC truth type.
`true_origin`	`int`	MC truth origin.
`is_tight`	`bool`	Passes the tight muon selection.

Reconstructed jet with b-tagging working points.