Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2003-09-11
Nucl.Phys. B682 (2004) 585-617
Physics
High Energy Physics
High Energy Physics - Theory
29 pages, 19 eps and 11 pstex figures v2: some references and comments added, misprints corrected
Scientific paper
10.1016/j.nuclphysb.2004.01.018
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.
Bajnok Zoltan
Böhm Gabriella
Taka'cs Ga'bor
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