45 citations · 176 across the 12 of their papers we have counts for
12 papers
Constructing Gravity Amplitudes from Real Soft and Collinear Factorisation
David C. Dunbar, James H. Ettle, Warren B. Perkins
Soft and collinear factorisations can be used to construct expressions for amplitudes in theories of gravity. We generalise the "half-soft" functions used previously to "soft-lifti…
The n-point MHV one-loop Amplitude in N=4 Supergravity
David C. Dunbar, James H. Ettle, Warren B. Perkins
We present an explicit formula for the n-point MHV one-loop amplitude in a N=4 supergravity theory. This formula is derived from the soft and collinear factorisations of the amplit…
Obtaining One-loop Gravity Amplitudes Using Spurious Singularities
David C. Dunbar, James H. Ettle, Warren B. Perkins
The decomposition of a one-loop scattering amplitude into elementary functions with rational coefficients introduces spurious singularities which afflict individual coefficients bu…
Augmented Recursion For One-loop Amplitudes
David C. Dunbar, James H. Ettle, Warren B. Perkins
We present a semi-recursive method for calculating the rational parts of one-loop amplitudes when recursion produces double poles. We illustrate this with the graviton scattering a…
Perturbative expansion of N<8 Supergravity
David C. Dunbar, James H. Ettle, Warren B. Perkins
We characterise the one-loop amplitudes for N=6 and N=4 supergravity in four dimensions. For N=6 we find that the one-loop n-point amplitudes can be expanded in terms of scalar box…
Augmented Recursion For One-loop Gravity Amplitudes
David C. Dunbar, James H. Ettle, Warren B. Perkins
We present a semi-recursive method for calculating the rational parts of one-loop gravity amplitudes which utilises axial gauge diagrams to determine the non-factorising pieces of…