Proton reconstruction with the TOTEM Roman pot detectors for high-<i>β</i>* LHC data | CU Experts

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. This paper presents; new methods of track reconstruction, measurements of strip-level; detection efficiencies, cross-checks of the LHC beam optics, and; detector alignment techniques, along with their application in the; selection of signal collision events. The track reconstruction is; performed by exploiting hit cluster information through a novel; method using a common polygonal area in the intercept-slope; plane. The technique is applied in the relative alignment of; detector layers with μm precision. A tag-and-probe method is; used to extract strip-level detection efficiencies. The alignment of; the Roman pot system is performed through time-dependent; adjustments, resulting in a position accuracy of 3 μm in the; horizontal and 60 μm in the vertical directions. The goal is; to provide an optimal reconstruction tool for central exclusive; physics analyses based on the high-β* data-taking period at; √(s) = 13 TeV in 2018.

Hayrapetyan A; Tumasyan A; Adam W; Andrejkovic JW; Benato L; Bergauer T; Chatterjee S; Damanakis K; Dragicevic M; Hussain PS

VIVO