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The Precision Proton Spectrometer (PPS) started operating in 2016 and has collected more than 110 fb$^{-1}$ of data over the course of the LHC Run 2, now fully available for physics analysis. This contribution covers the key features of the PPS alignment and optics calibration, which have been developed from scratch. The reconstructed proton distri...
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... physics motivation behind the PPS detector is the study of central exclusive production (CEP), i.e. the process pp → p ( * ) + X + p ( * ) mediated by color-singlet exchanges (photons, Pomerons, Z bosons), with at least one of the outgoing protons detected in PPS. Figure 1 shows the layout of the RP system installed at around 200-220 m from the CMS interaction point (IP5), along the beam line in LHC sector 56. A symmetric set of detectors is installed in LHC sector 45 at the opposite side of CMS. ...
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The Precision Proton Spectrometer (PPS) started operating in 2016 and has collected more than 110 fb ^{-1} − 1 of data over the course of the LHC Run 2, now fully available for physics analysis. This contribution covers the key features of the PPS alignment and optics calibration, which have been developed from scratch. The reconstructed proton dis...
![Figure 2: Optical part of the ToF detector [3].](profile/Olivier-Rousselle-2/publication/355697227/figure/fig2/AS:11431281167251832@1686612007069/Optical-part-of-the-ToF-detector-3_Q320.jpg)
The paper presents data on the muon component with a threshold \varepsilon_{thr} \geq ε t h r ≥ 1 GeV. Air showers were registered at the Yakutsk array during almost 50 years of continuous air shower observations. The characteristics of muons are compared with calculations of QGSjetII-04 and EPOS LHC models for a proton and an iron nucleus. There i...
