How quark hadron duality in QCD may work

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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Talk at QCD-97 Euroconference, Montpellier,France, July 1997. Technion preprint, 18 pp

Scientific paper

10.1016/S0920-5632(97)01111-0

We pursue the issue of the local quark-hadron duality at high energies in two- and four-dimensional QCD. A mechanism of the dynamical realization of the quark-hadron duality in two-dimensional QCD in the limit of large number of colors, $N_c \to \infty$, (the ' t Hooft model) is investigated. We argue that a similar mechanism of dynamical smearing may be relevant in four-dimensional QCD. Although particular details of our results are model-dependent (especially in the latter case), the general features of the duality implementation conjectured previously get further support.

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