Large N Phases of Chiral QCD 2 ∗
نویسندگان
چکیده
A matrix model is constructed which describes a chiral version of the large N U(N) gauge theory on a two-dimensional sphere of area A. This theory has three separate phases. The large area phase describes the associated chiral string theory. An exact expression for the free energy in the large area phase is used to derive a remarkably simple formula for the number of topologically inequivalent covering maps of a sphere with fixed branch points and degree n. This work was supported in part by funds provided by the U.S. Department of Energy (D. O. E.) under cooperative agreement DE-FC02-94ER40818 and in part by the divisions of Applied Mathematics of the U.S. Department of Energy under contracts DE-FG02-88ER25065 and DE-FG02-88ER25066. † [email protected] (After Sept. ’94, michael [email protected], Physics Department,CPO 325 Berea College, KY 40404) ‡ [email protected]
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تاریخ انتشار 1994