Course Outline for Physics 880.05

III. A. Thermodynamics and Phase Transitions (Chs. 9,13) Part 1

Comment on Generating Binomial Distribution

[Thanks to Randy Wells and Rick Mohr.] To generate a binomial distribution of n collisions out of A total with the probability of each being P:

  1. Start with n=0
  2. Loop through the A nucleons
  3. For each one, generate a random number between 0 and 1. If the number is less than P, add 1 to n (it's a hit!). Otherwise continue.
  4. After the loop, n is number you want!

You can check that this works by generating a large number of n's and calculating the mean and variance. You should find A*P and A*P*(1-P).

Recap of last time: Initial Energy Density

We'll quickly summarize the inputs to Bjorken's estimate of the initial energy density in a high-energy heavy-ion collision. We'll first plug in numbers using the empirical result for dN/dy and then review how the result is consistent with our Glauber picture (see notes from last period).

Quantum Chromodynamics: Things you should know

  1. quarks are spin-1/2 fermions => fermi statistics
  2. quarks come in six flavors
  3. How can three 10 MeV quarks make a 1 GeV baryon?
  4. "Current" quark mass vs. effective "constituent" quark mass
  5. QCD is a gauge field theory
  6. Deep-inelastic scattering

Color Factors [optional]

Bag Model

  1. Idea of color confinement motivates bag picture of hadrons
  2. Very simple picture; neglects or downplays important physics
  3. Details:
  4. What about QGP?

Return to 880.05 home page syllabus

Copyright © 1997,1998 Richard Furnstahl and James Steele.