Gradient formula for linearly self-interacting branes

Details Gradient formula for linearly self-interacting branes Gradient formula for linearly self-interacting branes

2002-04-04

arxiv.org/abs/hep-th/0204042v1

Commun.Math.Phys. 235 (2003) 289-311

Physics

High Energy Physics

High Energy Physics - Theory

23 pages

Scientific paper

10.1007/s00220-003-0800-1

The computation of long range linear self-interaction forces in string and higher dimensional brane models requires the evaluation of the gradients of regularised values of divergent self-interaction potentials. It is shown that the appropriately regularised gradient in directions orthogonal to the brane surface will always be obtainable simply by multiplying the regularised potential components by just half the trace of the second fundamental tensor, except in the hypermembrane case for which the method fails. Whatever the dimension of the background this result is valid provided the codimension is two (the hyperstring case) or more, so it can be used for investigating brane-world scenarios with more than one extra space dimension.

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