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LECTURE 42
     goals and outline

lecture title

    Inner Space/Outer Space: Particle Physics Meets Cosmology

text pages

lecture goals

  • Review the outstanding unanswered question in physics.
  • Study the intersection of nuclear/particle physics and cosmology. This intersection is the theory of interactions in very high energy systems such as stellar interiors and the big bang.
  • Learn how we can equate energy to distance probed to time when we are describing the early universe.
  • Define several symmetries or invariance operations.
  • Link symmetry breaking to having different coupling strengths.
  • Learn what is meant by unified field theory.
  • Define the amazing Planck length.
  • Define the amazing phase transitions in the early universe.
  • Look once again at the huge variation in scales of size which we understand something about.
  • Look at a few seminar topics from this semester's Physics Department schedules to see how many titles are understandable.

outline of lecture

    1. High Energy is Short Distance is Early Times

    2. Symmetries and Unified Field THeory

    3. Scales of Size

    4. Science News in Your Future

quotes

...the symmetry between the left and the right, is as old as human civilization...debated at length by philosophers of the past.

-- Chen-Ning Yang, Nobel Lecture 1957

To decide unequivocally whether parity is conserved in weak interactions, one must perform an experiment to determine whether weak interactions differentiate the right from the left. (One must) measure the angular distribution of the electrons coming from beta-decays of oriented nuclei... (This was done late in 1956 by Chien-Shiung Wu: Lee received a phone call from her that there was a rather large asymmetry in the angular distribution.)

-- Tsung-Dao Lee and Chen-Ning Yang, 1956

On reflecting a neutrino in a mirror, one sees nothing.

-- Abdus Salam, 1957

The fact that the large difference in the masses of the muon and the electron does not seem to induce other differences in their properties is one of the most fascinating in contemporary physics.

-- Leon Lederman, 1963

...the discovery of non-vanishing neutrino masses would shed light on the theory beyond the standard model; thus it is one of the important issues experimentalists have to address.

-- Jean-Luc Vuilleumier, 1986


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Please email any questions, comments, or suggestions to Professor Bernice Durand, bdurand@theory3.physics.wisc.edu.

Revised December 3, 1997.


Content © 1997, Bernice Durand
Images and layout © 1997, Shane Hamilton