Massive particles and unitarity cuts
arXiv:1202.2426
Abstract
We present an extension of the spinor integration formalism of one loop amplitudes from the double-cut to the single-cut case. This technique can be applied for the computation of the tadpole coefficients. Moreover we describe an off-shell continuation of one loop amplitudes that allows a finite evaluation of the unitarity cuts in the channel of a single massive external fermion.
To appear in the proceedings of the LCWS 2011, September 2011, Granada, Spain
References in corpus (12)
- Reducing full one-loop amplitudes to scalar integrals at the integrand level
- An Automated Implementation of On-Shell Methods for One-Loop Amplitudes
- Direct extraction of one-loop integral coefficients
- Full one-loop amplitudes from tree amplitudes
- A Numerical Unitarity Formalism for Evaluating One-Loop Amplitudes
- D-dimensional unitarity cut method
- On Triple-Cut of Scattering Amplitudes
- Unitarity Cuts with Massive Propagators and Algebraic Expressions for Coefficients
- Double-Cut of Scattering Amplitudes and Stokes' Theorem
- Closed-Form Decomposition of One-Loop Massive Amplitudes
- Unitarity Method with Spurious Pole
- Generalised Unitarity At One-Loop With Massive Fermions