Seminarium Fizyki Wielkich Energii

The decay of the Higgs boson to tau lepton pairs provides a sensitive probe of its CP properties. This talk presents an overview of a CP analysis within the CMS Experiment, covering the workflow from tau lepton reconstruction to the extraction of CP-sensitive observables. The first part introduces the reconstruction of tau leptons in CMS, including their identification, decay mode classification, and the evaluation of scale factors. The second part outlines the main components of the CP analysis, including background estimation, modern approaches to neutrino reconstruction, and the construction of polarimetric observables sensitive to CP-violating effects. Together, these elements illustrate how advances in both object reconstruction and analysis methodology contribute to improved sensitivity to the Higgs boson’s CP structure.