Fig. 5: Secondary vertex properties reconstructed using tracks grouped by the GN2 and SV1 algorithms. | Nature Communications

Fig. 5: Secondary vertex properties reconstructed using tracks grouped by the GN2 and SV1 algorithms.

From: Transforming jet flavour tagging at ATLAS

Fig. 5

The a transverse displacement and the b mass of the secondary vertex obtained by the GN2 (solid) and the SV1 (dotted) algorithms. While the transverse displacement is calculated via a Billoir fit performed on the tracks assigned to the vertex by the respective algorithm, the vertex mass is defined as the invariant mass of the same set of assigned tracks. MC truth (dashed) corresponds to an inclusive reference vertex derived from all tracks associated to simulation-level vertices containing only b-hadron tracks. The last bin in each plot includes overflow.

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