We propose a new mechanism of spontaneous supersymmetry breaking in noncommutative gauge theories. We find that in N = 1 noncommutative gauge theories both supersymmetry and gauge invariance areâ€¦ (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 = 4â€¦ (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.â€¦ (More)

Britto, Cachazo and Feng have recently derived a recursion relation for tree-level scattering amplitudes in Yang-Mills. This relation has a bilinear structure inherited from factorisation onâ€¦ (More)

We show how generalised unitarity cuts in D = 4 âˆ’ 2Ç« dimensions can be used to calculate efficiently complete one-loop scattering amplitudes in non-supersymmetric Yang-Mills theory. This approachâ€¦ (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 maximallyâ€¦ (More)

A precursor form of Neurospora crassa tyrosinase has been identified by Western transfer from crude protein extracts and by immunoprecipitation of in vitro translated tyrosinase mRNA. The molecularâ€¦ (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 helicityâ€¦ (More)

Using background field perturbation theory we study Wilsonian effective actions of noncommutative gauge theories with an arbitrary matter content. We determine the Wilsonian coupling constant and theâ€¦ (More)

Recently it has been proposed that the coefficient of the three-point function of the BMN operators in N = 4 supersymmetric Yang-Mills theory is related to the three-string interactions in theâ€¦ (More)