Free online courseParticle Physics

Course Description

Particle physics is the science of what everything is made of and how the fundamental forces act at the smallest scales. This free online course guides you through the key ideas that modern high-energy physics uses to describe nature, connecting elegant theory with the experimental tools that revealed it. You will build intuition for how physicists talk about matter and interactions, from the role of force carriers to the behavior of rare particles created in energetic collisions.

Along the way, you will see how major discoveries reshaped our understanding of the universe: the appearance of antimatter, the unexpected breaking of symmetries such as parity in weak processes, and the subtle phenomenon of CP violation. These ideas are not just historical milestones; they are the backbone of how particle models are tested and refined, especially through mixing and decay behavior. You will also connect key concepts such as strangeness, lepton families, and the significance of discoveries like the tau lepton, which expanded the known particle zoo and helped confirm broader theoretical structure.

The course also emphasizes how we know what we know. You will explore how particles interact with matter and how detectors turn invisible events into measurable signals, including the use of Cherenkov radiation, emulsions, and other techniques for identifying particles and tracking energy loss in different media. Through these experimental perspectives, abstract quantities become practical: coupling strengths, scattering variables, resonance behavior, and probability patterns in decays gain meaning as pieces of evidence rather than isolated formulas.

As you progress, you will develop a clearer picture of how symmetry principles and Lagrangian thinking organize particle physics, why certain infinities appear in calculations and how they are treated, and what deep inelastic scattering reveals about substructure. The exercises help you check understanding and strengthen scientific reasoning, making this an ideal option for students in school-level physics who want to go beyond classical topics, as well as curious learners aiming to understand modern research headlines such as neutrino flavor change during propagation. By the end, you will be better prepared to follow particle physics discussions with confidence, whether your goal is academic enrichment, exam support, or a foundation for more advanced study.