Higgs Properties at the LHC

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Focusing on the Higgs particle's properties, this thesis explores its significance in electroweak symmetry breaking and the early universe's cosmological phase transition. It rules out a generic spin-2 Higgs impostor through precision electroweak measurements and unitarity considerations. The work also establishes constraints on anomalous CP-violating Higgs-Top Yukawa couplings and evaluates future measurement prospects. Additionally, it delves into the electroweak phase transition and the creation of cosmological matter-antimatter asymmetry linked to these anomalous couplings.