143 citations · 1.3k across the 35 of their papers we have counts for
4 papers · 1 filter
MHV Diagrams from an All-Line Recursion Relation
Mathew Bullimore
We consider the recursion relation for loop integrands in planar N = 4 SYM generated by an all-line shift of momentum twistors. We examine the behaviour of the rational loop integr…
Kinetic mixing of U(1)s for local string models
Mathew Bullimore, Joseph P. Conlon, Lukas T. Witkowski
We study kinetic mixing between massless U(1)s in toroidal orbifolds with D3-branes at orbifold singularities. We focus in particular on C^3/Z_4 singularities but also study C^3/Z_…
MHV Diagrams in Momentum Twistor Space
Mathew Bullimore, Lionel Mason, David Skinner
We show that there are remarkable simplifications when the MHV diagram formalism for N=4 super Yang-Mills is reformulated in momentum twistor space. The vertices are replaced by un…
Inverse Soft Factors and Grassmannian Residues
Mathew Bullimore
The action of inverse soft factors on scattering amplitudes in N=4 SYM is shown to take a remarkably simple form in momentum twistor space. This is used to identify individual resi…