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On perturbative quantum field theory with boundary

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arxiv hep-th/0309119 v2 pith:KLJVKG2R submitted 2003-09-11 hep-th

classification hep-th
keywords boundaryfieldperturbativequantumtheoryanalyticityanalyzedargument
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Boundary quantum field theory is investigated in the Lagrangian framework. Models are defined perturbatively around the Neumann boundary condition. The analyticity properties of the Green functions are analyzed: Landau equations, Cutkosky rules together with the Coleman-Norton interpretation are derived. Illustrative examples as well as argument for the equivalence with other perturbative expansions are presented.

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