Speaker
Description
The CMS group at UERJ has been an integral part of the Precision Proton Spectrometer (PPS) subsystem project of the collaboration.
The PPS detector system has been installed and integrated into the CMS experiment since 2016 and has collected over $110\,\text{fb}^{-1}$ of data during the LHC Run 2.
It is a joint project of the CMS and TOTEM collaborations with the capability of measuring protons scattered at very small angles, operating at high instantaneous luminosity.
The physics motivation of the PPS project is the study of central exclusive production (CEP), i.e. the process $\mathrm{p}\mathrm{p} \to \mathrm{p}^{\left(\ast\right)} + \mathrm{X} + \mathrm{p}^{\left(\ast\right)}$, mediated by colour-singlet gluon exchange, photons or $Z$ bosons, by detecting at least one of the outgoing protons.
CEP provides unique sensitivity to SM processes and BSM physics, e.g. searches for anomalous gauge couplings, axion-like particles, inclusive dark matter (DM) and DM mediator searches, and new resonances.
The CMS collaboration intends to construct a new near-beam proton spectrometer at the High-Luminosity LHC (HL-LHC), similar to the PPS system.
By installing detectors in suitable locations in the accelerator chain, the accessible mass range allows the study of CEP where the system $\mathrm{X}$ is the SM Higgs boson, and with a mass acceptance upper limit of $\approx 2.7\,\text{TeV}$.
This talk will review the PPS detector system, the proton reconstruction chain and its performance using Run 2 data, and highlight measurements of CEP.
Finally, the design, feasibility and expected performance of the detector system at the HL-LHC will be discussed.
| Key Words | CMS, PPS, CEP, HL-LHC |
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