Andreas Brandhuber

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We use the Konishi anomaly equations to construct the exact effective superpotential of the glueball superfields in various N = 1 supersymmetric gauge theories. We use the superpotentials to study in detail the structure of the spaces of vacua of these theories. We consider chiral and non-chiral SU(N) models, the exceptional gauge group G2 and models that(More)
We propose a new, twistor string theory inspired formalism to calculate loop amplitudes in N = 4 super Yang-Mills theory. In this approach, maximal helicity violating (MHV) tree amplitudes of N = 4 super Yang-Mills are used as vertices, using an offshell prescription introduced by Cachazo, Svrcek and Witten, and combined into effective diagrams that(More)
We present a supersymmetric recursion relation for tree-level scattering amplitudes in N = 4 super Yang-Mills. Using this recursion relation, we prove that the tree-level S-matrix of the maximally supersymmetric theory is covariant under dual superconformal transformations. We further comment on the consequences that the transformation properties of the(More)
It is a remarkable fact that MHV amplitudes in maximally supersymmetric Yang-Mills theory at arbitrary loop order can be written as the product of the tree amplitude with the same helicity configuration and a universal, helicity-blind function of the kinematic invariants. In this note we show how for one-loop MHV amplitudes with an arbitrary number of(More)
We extend the twistor string theory inspired formalism introduced in hep-th/0407214 for calculating loop amplitudes in N =4 super Yang-Mills theory to the case of N =1 (and N =2) super Yang-Mills. Our approach yields a novel representation of the gauge theory amplitudes as dispersion integrals, which are surprisingly simple to evaluate. As an application we(More)
We use the recently proposed supergravity approach to large N gauge theories to calculate ordinary and spatial Wilson loops of gauge theories in various dimensions. In this framework we observe an area law for spatial Wilson loops in four and five dimensional supersymmetric Yang-Mills at finite temperature. This can be interpreted as the area law of(More)
Within the AdS/CFT correspondence we use multicentre D3-brane metrics to investigate Wilson loops and compute the associated heavy quark–antiquark potentials for the strongly coupled SU(N) super-Yang–Mills gauge theory, when the gauge symmetry is broken by the expectation values of the scalar fields. For the case of a uniform distribution of D3-branes over(More)
We discuss N = 2 supersymmetric Type IIA brane configurations within M theory. This is a generalization of the work of Witten to all classical groups. Work supported in part by the US-Israel Binational Science Foundation, by GIF – the German-Israeli Foundation for Scientific Research, by the Israel Science Foundation and by the European Commission TMR(More)