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The document outlines the third lecture in a Quantum Field Theory series by Hasan Mohammad, focusing on the Higgs mechanism, which includes discussions on symmetry breaking, mass terms in the Lagrangian, and interactions involving multiple particles. It references key historical milestones, such as the 2013 Nobel Prize in Physics and the Higgs boson discovery in 2012. The lecture emphasizes the significance of the Higgs mechanism in field theory and its implications for mass generation.