Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-04-19
Phys.Rev. D65 (2002) 025011
Physics
High Energy Physics
High Energy Physics - Theory
16 pages, LaTeX. References and an appendix added
Scientific paper
10.1103/PhysRevD.65.025011
Field theories in the presence of branes encounter localized divergences that renormalize brane couplings. The sources of these brane-localized divergences are understood as arising either from broken translation invariance, or from short distance singularities as the brane thickness vanishes. While the former are generated only by quantum corrections, the latter can appear even at the classical level. Using as an example six-dimensional scalar field theory in the background of a 3-brane, we show how to interpret such classical divergences by the usual regularization and renormalization procedure of quantum field theory. In our example, the zero thickness divergences are logarithmic, and lead classically to non-trivial renormalization group flows for the brane couplings. We construct the tree level renormalization group equations for these couplings as well as the one-loop corrections to these flows from bulk-to-brane renormalization effects.
Goldberger Walter D.
Wise Mark B.
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