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Understanding the Universe: Fundamental Particles and Interactions in Particle Physics

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Explore the intricate world of particle physics, where the smallest components of matter and the fundamental forces that govern their interactions are revealed. This comprehensive guide addresses questions about the universe's composition, the forces that hold it together, and the origins of fundamental particles like quarks and leptons. Delve into the history of particle physics, the significance of the Standard Model, and the role of interactions such as strong, weak, electromagnetic, and gravitational forces in shaping the cosmos.

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Understanding the Universe: Fundamental Particles and Interactions in Particle Physics

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  1. March 29, 2011 HEP Interactions Kihyeon Cho

  2. What is the world made of? What holds the world together? Where did we come from? Tools ? the smallest things in the world interactions (forces) between them the Universe’s past, present, and future Particle Physics: physics where small and big things meet, inner and outer space meet

  3. Contents • Introduction • Fermion-Boson • History • Particle and Antiparticle • 입자물리학과 노벨상 • Quark and Lepton • Interactions • Conservation • Natural Units

  4. Interactions

  5. 입자의 표준모형 (The Standard Model)

  6. 표준모형 (Standard Model) • What does world made of? • 6 quarks • u, d, c, s, t, b • Meson (q qbar) • Baryon (qqq) • 6 leptons • e, muon, tau • e, , 

  7. 기본상호작용

  8. What holds it together?(The four interactions)

  9. Acts on charge 강력 2/3 e -1/3 e 전자기력 0 -1 e 약력

  10. Carried by charge 강력 0 0 전자기력 0 ±1 약력

  11. Acts on charge charge 강력 0 0 전자기력 0 ±1 약력

  12. Interaction of Fundamental Particles charge 0 • Quark • EM, Weak, Strong, Gravitational • Lepton • Neutrino • Weak only • e, mu, tau • EM, Weak, Gravitational +2/3 e 0 -1/3 e 0 ±1 0 - e

  13. Electromagnetic interactions w/ atoms

  14. Electromagnetic interactions w/ atoms

  15. Summary of Electromagnetic interactions

  16. Perkins 1.6 Electromagnetic Interactions

  17. Electroweak Interactions Perkins 1.7

  18. Strong Interactions Perkins 1.8

  19. 강력 통일장이론(GUT) 전자기력 초대칭이론 전자기약력 대통일이론 (TEO) 약력 초끈이론 중력

  20. 초대칭이론 (Supersymmetry)

  21. 초대칭 이론

  22. => 초끈이론

  23. 초끈이론(Superstring Theory)

  24. Extra Dimension 초끈이론 ↓ Extra Dimension

  25. 강력 통일장이론(GUT) 전자기력 초대칭이론 전자기약력 대통일이론 (TEO) 약력 초끈이론 중력

  26. References • Class P720.02 by Richard Kass (2003) • B.G Cheon’s Summer School (2002) • S.H Yang’s Colloquium (2001) • Class by Jungil Lee (2004) • 노벨상이 만든 세상- 물리학 • Newton (2011.3, 2008.10) • PDG home page (http://pdg.lbl.gov)

  27. Thank you.

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