A Framework for Multijet Predictions and its application to Higgs production at the LHC
by
Jeppe Andersen
→
Europe/London
OC218
OC218
Description
We present a new framework for calculating multi-jet
observables. The framework is based on the factorisation of
general scattering amplitudes in the kinematical limit of
large invariant mass between all particles. This
factorisation was speculated in general Regge theory and
later proved for QCD. We will briefly discuss earlier
attempts at utilising this factorisation through the BFKL
equation, and some of its shortcomings. We show that by
further constraining the analyticity of scattering
amplitudes away from the exact limits, we get good agreement
order by order with full, fixed order perturbation theory,
and therefore get firm predictions on the all-order
behaviour. As an example, we study Higgs boson production
through gluon fusion in association with at least two jets
at the LHC. The technique is readily applicable to other
multi-jet processes.
