1 / 17

Title Page

Title Page. Paul Matteri. What is Grand Unified Theory?. Unified field theory is an attempt to describe all fundamental forces and the relationships between elementary particles in terms of a single theoretical framework. Current Fundamental Forces. Electromagnetic Weak Strong Gravity.

steel-hunt
Télécharger la présentation

Title Page

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Title Page Paul Matteri

  2. What is Grand Unified Theory? • Unified field theory is an attempt to describe all fundamental forces and the relationships between elementary particles in terms of a single theoretical framework.

  3. Current Fundamental Forces • Electromagnetic • Weak • Strong • Gravity

  4. The Road to Unification

  5. The History of Grand Unified Theory

  6. Electricity and Magnetism • Michael Faraday: • Born: September 22, 1791 Died: August 25, 1867 • English physicist and chemist whose many experiments contributed greatly to the understanding of electromagnetism.

  7. Electricity and Magnetism • James Maxwell • Born June 13, 1831, Edinburgh, Scotlanddied November 5, 1879, Cambridge, Cambridgeshire, England • Scottish physicist best known for his formulation of electromagnetic theory. • Incorporated light and wave phenomena into electromagnetism

  8. Electricity and Magnetism • In 1905 Einstein’s special theory of relativity showed that electricity and magnetism were link and that Maxwell was correct. • The single force of Electromagnetism is born.

  9. Electroweak Force • Sheldon Glashow • Abdus Salam • Steven Weinberg • Each physicist independently found that the weak nuclear force could be unified with electromagnetic force.

  10. Electroweak Force • At extremely high energies, 1015 GeV the electromagnetic and weak forces become the same. • The relationship is based on the exchange of four particles: the photon of EM interactions, two charged W particles and a neutral Z particle.

  11. Electroweak Force

  12. Strong Nuclear Force • Quantum Chromodynamics was developed to explain strong force during the 1970s. • Quarks are believed interact by exchanging gluons. • The hope is to use that similarity to unify strong with electroweak force. • The unification cannot be found because energy levels 1012 higher than those needed to develop the electroweak force are required to test further unification.

  13. Strong Nuclear Force

  14. Gravity • Newton showed that both astronomical and terrestrial motion could be explained with gravitation • In 1915 Einstein’s theory of general relativity was written. • Einstein spent 30 years trying to unify EM with gravity and failed.

  15. The Future of the Grand Unified Theories

  16. Future • Gravity may be unified by superstring theory, which is the best theory right now for unification. • Higher energy experiments are needed to study the strong force and its unification with electroweak. • More study of electroweak is still needed. By using the simplest version of the theory a calculation was performed that determined a proton life several orders of magnitude too short, from 1029 to 1031 years. • Experiments show that the life of a proton is greater than 1032 years.

  17. References "Electromagnetism." Encyclopædia Britannica. 2004. Online. Retrieved 10 May 2004 from <http://search.eb.com/eb/article?eu=108502>. "Electroweak Theory." Encyclopædia Britannica. 2004. Online. Retrieved 10 May 2004 from <http://search.eb.com/eb/article?eu=32909>. “Forces.” Bring, Lars. Nobel e Museum. Online. Retrieved on 7 May 2004 from <http://www.nobel.se/physics/articles/brink/> “Grand Unified Theory.” CERN. Online. Retrieved on 8 May 2004 from <http://pdg.web.cern.ch/pdg/cpep/grand.html> “G.U.T.” York University. Online. Retrieved on 7 May 2004 from <http://www.hep.yorku.ca/yhep/forces.html> Modern Physics for Scientists and Engineers, 2nd Edition. Thornton. Saunders College Publishing. 2000. Pg. 13, 494-496. "Unified Field Theory." Encyclopædia Britannica. 2004. Retrieved 10 May 2004 from <http://search.eb.com/eb/article?eu=76201>. “Unified Field Theory.” University of Oregon. Online. Retrieved on 10 May 2004 from <http://zebu.uoregon.edu/~js/glossary/unified_field_theory.html>

More Related