The Next To Next Challenge: towards numerical two-loop amplitude reduction

Abstract: The Large Hadron Collider (LHC) started its first beam in 2008. The data collected so far led to the discovery and characterisation of the Higgs boson and allowed important precision tests of the Standard Model. In parallel to that, continuous efforts are being made to shed light on possible New Physics up to the energy frontier. Accurate synergy between theory and experiment - and comparable precision on both sides - is key to foster discoveries. From the theory side, the path to precision runs through several directions. In several cases, two-loop scattering amplitudes are the bottleneck. In this talk I will discuss ongoing efforts towards integrand-level reduction of two-loop helicity amplitudes. First I will describe a method for extracting the coefficients of the reduction. I will elaborate on the advantages, but also on the challenges, of performing numerical computations of two-loop integrands in the context of dimensional regularisation. Finally I will discuss work underway to develop a numerical framework to achieve this goal.

general relativity and quantum cosmologyHEP - experimentHEP - latticeHEP - phenomenologyHEP - theory

Audience: researchers in the topic

( slides )

NKUA HEP Seminars

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