Compact Muon Solenoid
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| CMS-PAS-SMP-23-006 | ||
| Proton reconstruction using the TOTEM Roman pot detectors during the high-$ \beta^* $ data taking period | ||
| CMS Collaboration | ||
| 18 July 2024 | ||
| Abstract: The TOTEM Roman pot detectors are used to reconstruct the transverse momentum of scattered protons and to estimate the transverse location of the primary interaction. In this study advanced methods of local track reconstruction, measurements of strip-level detection efficiencies, cross-checks of beam optics, and detector alignment techniques are presented, along with their application in the selection of signal collision events. The local track reconstruction is performed by exploiting hit cluster information through a novel method, by finding a common polygonal area in the intercept-slope plane. The tool is applied in the relative alignment of detector layers with $ \mu $m precision. A tag-and-probe method is used to extract strip-level detection efficiencies. The proton reconstruction corrections are calculated using a simulation. The absolute alignment of the Roman pot system is performed through several measured quantities. The necessary run-by-run adjustments are in the range $ \pm $50 $\mu$m in horizontal, and $ \pm $0.5 mm in vertical directions. The goal is to provide a solid ground for exclusive physics analyses based on the high-$ \beta^* $ data taking period in 2018. | ||
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Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JINST. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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