paper

Absorption by Double-Centered D3-Branes and the Coulomb Branch of N=4 SYM Theory

arXiv:hep-th/9912073 · doi:10.1088/1126-6708/2000/05/041

Abstract

We calculate the classical cross-section for absorption of a minimally coupled scalar in the double-centered D3-brane geometry. The dual field theory has gauge symmetry broken to S(U(N_1)*U(N_2)) and is on the Coulomb branch of N=4 Super Yang-Mills theory. Our analysis is valid at energy scales much smaller than the W particles mass, giving logarithmic corrections to the cross section calculated at the IR conformal fixed points. These corrections are associated with deformations of the N=4 Super Yang-Mills theory by irrelevant operators that break conformal invariance and correspond to processes where a virtual pair of gauge particles or a virtual pair of W bosons interact with the incident wave to create a pair of gauge particles.

25 pages, 3 figures, Latex; (v2) a few details corrected, references added; (v3) minor corrections, version to appear in JHEP

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