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Authors
Advisor(s)
Abstract(s)
Beyond the Standard Model (BSM) scenarios suggest the existence of new particles or interactions to address some of the fundamental questions left unanswered by the Standard Model (SM). The majority of these scenarios suggest the existence of a charged Higgs boson, and its observation would directly imply the existence of BSM physics. With this in mind, this project focused on studying the central and exclusive production (CEP) of a single pair of charged Higgs bosons at the Large Hadron Collider (LHC) Run 3, including projections for the High-Luminosity LHC (HL-LHC) Phase-2, both at a centerof-mass energy of √ s = 13.6 T eV . Additionally, CEP processes are advantageous to study due to the lower number of competing background processes, but also because it’s possible to perform proton tagging with the Precision Proton Spectrometer (PPS) installed at the Compact Muon Solenoid (CMS). This project also takes advantage of the first CMS jet matching High Level Trigger (HLT) designed for studying processes with a four-jet system in the final states. This study used events simulated with the tools MadGraph5 aMC@NLO, Pythia8, and Delphes. This study started with the calculation of the cross sections for the signal and background events. The next part of the analysis focused on the detector configurations for the LHC Run 3 and the HL-LHC Phase-2, and several studies were performed on the impact of pileup interactions, on the acceptance of the PPS detector, on the efficiency of the HLT, and on the statistical sensitivity to exclude the signal process. A comparison between the LHC Run 3 and HL-LHC Phase-2 configurations was also made to highlight the key differences in event analysis. Lastly, remarks were made on possible HLT improvements for the HL-LHC Phase-2, as well as on future studies that could enhance event analysis.
Description
Tese de mestrado, Física e Astrofísica, 2025, Universidade de Lisboa, Faculdade de Ciências
Keywords
Charged Higgs Boson Proton Tagging High-Luminosity Large Hadron Collider BSM Physics Pileup interactions