Automation of 2-loop Amplitude Calculations

Understand

Some of the tools and techniques that have recently been used to compute Higgs boson pair production at NLO in QCD are discussed.

• The calculation relies on the use of integral reduction, to reduce the number of integrals which must be computed, and expressing the amplitude in terms of a quasi-finite basis, which simplifies their numeric evaluation.
• Emphasis is placed on sector decomposition and Quasi-Monte Carlo (QMC) integration which are used to numerically compute the master integrals.