6 papers
Double-Cut of Scattering Amplitudes and Stokes' Theorem
Pierpaolo Mastrolia
We show how Stokes' Theorem, in the fashion of the Generalised Cauchy Formula, can be applied for computing double-cut integrals of one-loop amplitudes analytically. It implies the…
One-loop phi-MHV amplitudes using the unitarity bootstrap: the general helicity case
E. W. N. Glover, Pierpaolo Mastrolia, Ciaran Williams
We consider a Higgs boson coupled to gluons via the five-dimensional effective operator H tr G_{μν}G^{μν}. We treat H as the real part of a complex field phi that couples to the se…
S@M, a Mathematica Implementation of the Spinor-Helicity Formalism
D. Maitre, P. Mastrolia
In this paper we present the package S@M (Spinors@Mathematica) which implements the spinor-helicity formalism in Mathematica. The package allows the use of complex-spinor algebra a…
On Triple-Cut of Scattering Amplitudes
Pierpaolo Mastrolia
It is analysed the triple-cut of one-loop amplitudes in dimensional regularisation within spinor-helicity representation. The triple-cut is defined as a difference of two double-cu…
Twistors and Unitarity
Pierpaolo Mastrolia
We review on the recent developments for the computation of scattering amplitudes, with attention to the on-shell formalisms and unitarity-based methods.
D-dimensional unitarity cut method
Charalampos Anastasiou, Ruth Britto, Bo Feng +2
We develop a unitarity method to compute one-loop amplitudes with massless propagators in d=4-2*epsilon dimensions. We compute double cuts of the loop amplitudes via a decompositio…