Ch. 33 Introduction to Particle Physics - College Physics 2e | OpenStax

Introduction to Particle Physics

• Definition of Particle Physics: The study of the substructures of atoms and nuclei, specifically aiming to identify fundamental particles that possess no further internal structure.
• Hierarchy of Physics:
  • Atomic Physics: Focuses on the smallest units of elements and compounds.
  • Nuclear Physics: Focuses on atomic nuclei and their components (protons and neutrons).
  • Particle Physics: Focuses on the constituents of protons and neutrons and the search for truly fundamental building blocks.
• Systematic Nature: Similar to the periodic table and the chart of nuclides, particle physics reveals a complex array of particles with systematic properties and underlying structures.
• The Search for "Fundamental": While current research suggests some particles may lack substructure, historical precedent (e.g., atoms once being considered the ultimate building block) leaves open the possibility of deeper, undiscovered layers of matter.
• Key Themes:
  • The intimate relationship between particles and fundamental forces.
  • The influence of subatomic phenomena on the large-scale structure and character of the universe.