ATLAS Forward Proton Time-of-Flight (ToF) detectors of the ATLAS Forward Proton (AFP) system are designed to measure the primary vertex z-position of central exclusive processes by comparing the arrival times measured in the ToF from the two intact protons. The presented results are related to the performance of the AFP ToF detector operation in 2022.
The studies used low pile-up data with the average number of interactions per bunch crossing of 0.05 collected in the middle of 2022 using ToF stations at both sides of ATLAS (Far A and Far C).
The time resolution of individual channels was measured to be between 20 ps and 40 ps.
The AFP ToF efficiency ranged from 5$\%$ to 70$\%$ in different channels. The distribution of the difference between the primary vertex z-position measured by ATLAS and the vertex reconstructed by the AFP ToFs is studied.
The resulting vertex-matching resolution was observed approximately (8 −- 10) mm for the different configurations.
Volume 449 -
The European Physical Society Conference on High Energy Physics (EPS-HEP2023) -
T12 Detector R&D and Data Handling
ATLAS Forward Proton Time-of-Flight detectors: status, performance and new physics results
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Pre-published on:
December 14, 2023
Published on:
March 21, 2024
Abstract
DOI: https://doi.org/10.22323/1.449.0585
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.