paper

Two-loop N=4 Super Yang Mills effective action and interaction between D3-branes

arXiv:hep-th/0110173 · doi:10.1016/S0550-3213(01)00575-2

Abstract

We compute the leading low-energy term in the planar part of the 2-loop contribution to the effective action of SYM theory in 4 dimensions, assuming that the gauge group is broken to by a constant scalar background . While the leading 1-loop correction is the familiar term, the 2-loop expression starts with . The 1-loop constant is known to be equal to the coefficient of the term in the Born-Infeld action for a probe D3-brane separated by distance from a large number of coincident D3-branes. We show that the same is true also for the 2-loop constant : it matches the coefficient of the term in the D3-brane probe action. In the context of the AdS/CFT correspondence, this agreement suggests a non-renormalization of the coefficient of the term beyond two loops. Thus the result of hep-th/9706072 about the agreement between the term in the D0-brane supergravity interaction potential and the corresponding 2-loop term in the 1+0 dimensional reduction of SYM theory has indeed a direct generalization to 1+3 dimensions, as conjectured earlier in hep-th/9709087. We also discuss the issue of gauge theory -- supergravity correspondence for higher order (, etc.) terms.

33 pages, latex

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