Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 19: Methods in particle physics 2 (alignment, luminosity)

T 19.3: Vortrag

Montag, 4. März 2024, 16:30–16:45, Geb. 30.41: HS 1

Global alignment of the LHCb SciFi Tracker and Vertex Locator — •Nils Breer, Biljana Mitreska, and Johannes Albrecht — TU Dortmund University, Dortmund, Germany

The LHCb tracking systems including the Scintillating Fibre Tracker (SciFi) and the VErtex LOcator (VELO) underwent a major upgrade as part of the LHCb upgrade I. As part of the upgrade, it is crucial for the VELO and the SciFi to be aligned to achieve the best possible physics performance and data quality.

A new alignment strategy is developed combining the VELO together with the SciFi to form a combined procedure named global alignment. This allows for studying effects on different constraints and weak modes, that can further enhance the precision, by also using the VELO information for the track reconstruction in the SciFi. A more realistic description of the SciFi modules is implemented to represent the bending of the modules. This is a key piece of the current alignment strategy.

The alignment configuration of multiple detector elements of the VELO and the SciFi is discussed using the 2023 LHCb data. The updates to the alignment strategy by adding a more realistic description of the SciFi modules will be presented.

Keywords: CERN; LHCb; Alignment