Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-04-28
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, preprint MIT-CTP-2297. 7 figures automatically included, 2 uuencoded. (The relationship between divergences in the s
Scientific paper
Several string theories related to QCD in two dimensions are studied. For each of these theories the large $N$ free energy on a (target) sphere of area $A$ is calculated. By considering theories with different subsets of the geometrical structures involved in the full QCD${}_2$ string theory, the different contributions of these structures to the string free energy are calculated using both analytic and numerical methods. The equivalence between the leading terms in the $SU(N)$ and $U(N)$ free energies is simply demonstrated from the string formulation. It is shown that when $\Omega$-points are removed from the theory, the free energy is convergent for small and large values of $A$ but divergent in an intermediate range. Numerical results indicate that the free energy for the full QCD${}_2$ string fails to converge at the Douglas-Kazakov phase transition point. Similar results for a single chiral sector of the theory, such as has recently been studied by Cordes, Moore, and Ramgoolam, indicate that there are three distinct phases in that theory. These results indicate that from the point of view of the strong coupling phase, the phase transition in the full QCD${}_2$ string arises from the entropy of branch-point singularities.
No associations
LandOfFree
Counting Strings and Phase Transitions in 2D QCD does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Counting Strings and Phase Transitions in 2D QCD, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Counting Strings and Phase Transitions in 2D QCD will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-677617