Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 14: Detectors 3 (muon detectors)
T 14.3: Talk
Monday, March 4, 2024, 16:30–16:45, Geb. 30.23: 3/1
Impact of chamber deformations of the ATLAS' New Small Wheel on muon reconstruction performance — •Stefanie Götz1, Otmar Biebel1, Valerio D'Amico1, Ralf Hertenberger1, Eshita Kumar1, Roman Lorenz1, Katrin Penski1, Nick Schneider1, Patrick Scholer2, Chrysostomos Valderanis1, and Fabian Vogel1 — 1LMU München — 2Carleton University Ottawa
Previous studies demonstrate that the New Small Wheel (NSW) chambers' residual misalignment originating from measurement uncertainties of the alignment system is small enough to allow muon reconstruction with sufficient accuracy for CERN's high luminosity upgrade of the Large Hadron Collider (LHC). However, deformations and heat expansions were assumed to have subordinate effect compared to chamber translations and rotations but they actually might have a contribution that will become relevant for further improvement of the muon momentum measurement. This study therefore investigates the behaviour of alignment uncertainties from deformations/expansions on Monte Carlo samples generated by the simulation software of the ATLAS experiment with regard to their translational/rotational equivalents/compositions. A realistic estimation for the residual uncertainties of the parameters describing deformations/expansions allows finally to evaluate the overall impact on the muon reconstructed performance.
Keywords: Detector alignment; Myons; New Small Wheel; ATLAS