Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-08-10
Nucl.Phys.B733:123-131,2006
Physics
High Energy Physics
High Energy Physics - Theory
11 pages,some typos corrected, to be appeared in Nucl. Phys. B
Scientific paper
10.1016/j.nuclphysb.2005.11.008
The large-N limit of the expectation values of the Wilson loops corresponding to two-dimensional U(N) Yang-Mills and generalized Yang-Mills theories on a sphere are studied. The behavior of the expectation values of the Wilson loops both near the critical area and for large areas are investigated. It is shown that the expectation values of the Wilson loops at large areas behave exponentially with respect to the area of the smaller region the boundary of which is the loop; and for the so called typical theories, the expectation values of the Wilson loops exhibit a discontinuity in their second derivative (with respect to the area) at the critical area.
Alimohammadi Masoud
Khorrami Mohammad
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