Apr 2 – 5, 2019
Jardí Botànic de València
Europe/Zurich timezone

Optimization of the Adaptive Multi Vertex Finder in ATLAS

Apr 5, 2019, 11:30 AM
Jardí Botànic de València

Jardí Botànic de València

Carrer Quart 80, 46008 València, Spain
YSF talk 3: Advanced usage of tracks


Izaac Sanderswood (Lancaster University (GB))


The increasing track multiplicity in ATLAS poses new challenges for primary vertex reconstruction software, reaching to over 70 inelastic proton-proton collisions per beam crossing during Run-2 of the LHC and even more extreme vertex density in the next upcoming Runs. One way to get around these challenges, is to take a global approach to the track assignment to primary vertices, as opposed to the Iterative Vertex Finder procedure that was used in Run-2.
The Adaptive Multi Vertex Finder, a true multi-vertex implementation of the adaptive vertex finder algorithm is one such approach, which deploys the same adaptive vertex fitting technique as the Iterative Vertex Finder procedure, but fits for N vertices in parallel to take into account the vertex structure of the event.
This talk summarises the optimization and expected performance of the Adaptive Multi Vertex Finder for conditions foreseen for Run-3 of the LHC. These studies are coupled to a newly optimised vertexing seeder and further performance studies in the ITk scenario.

Primary author

Izaac Sanderswood (Lancaster University (GB))


Matthias Danninger (University of British Columbia (CA)) Nora Emilia Pettersson (University of Massachusetts (US))

Presentation materials

Peer reviewing