Twist Points as Branch Points for the QCD$_2$ String

Details Twist Points as Branch Points for the QCD$_2$ String Twist Points as Branch Points for the QCD$_2$ String

1993-10-16

arxiv.org/abs/hep-th/9310105v1

Phys.Lett. B319 (1993) 466-470

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, BRX-TH-352, JHU-TIPAC-930024, BOW-PH-101

Scientific paper

10.1016/0370-2693(93)91752-9

We show that the string representation of the QCD$_2$ partition function satisfies, by virtue of a Young-tableau-transposition symmetry, the topological constraint that any branched covering of an orientable or nonorientable surface without boundary must have an {\em even} branch point multiplicity. This statement holds for each chiral sector and requires multiple branch point behavior for the twist points, since cross-terms appear that couple twist points with odd powers of simple branch points. We obtain the same result for the complete partition function of $\son$ and $\spn$ Yang-Mills$_2$ theory.

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