International Journal of Modern Physics A
We construct a classical dynamical system whose phase space is a certain infinite dimensional Grassmannian manifold, and propose that it is equivalent to the large N limit of two-dimensional QCD with an O(2N + 1) gauge group. In this theory, we find that baryon number is a topological quantity that is conserved only modulo 2. We also relate this theory to the master field approach to matrix models.
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Friedmann, Tamar, "On Baryon Number Non-Conservation in Two-Dimensional O(2N+1) QCD" (2010). Mathematics and Statistics: Faculty Publications, Smith College, Northampton, MA.