TL;DR
The paper discusses the antenna subtraction method for handling infrared singularities in NNLO QCD calculations, applied to dijet production at the LHC, providing a practical approach for precise theoretical predictions.
Contribution
It introduces a detailed implementation of the antenna subtraction method for NNLO jet calculations, including IR divergence management and practical diagrammatic representations.
Findings
IR subtraction terms effectively absorb divergences
Application to LHC dijet production demonstrated
Pictorial matrix element and antenna function representations
Abstract
In this talk I discuss the antenna subtraction method for isolating infrared (IR) singularities of jet cross sections in perturbative QCD. The method is applied at next-to-next-to-leading order (NNLO) to dijet production in hadron collisions at the LHC. The double real radiative corrections to the dijet cross section are considered and their IR behaviour is examined. IR subtraction terms are constructed to absorb numerical divergences of the cross section in the single and double unresolved regions of phase space using the antenna subtraction method. A pictorial representation of matrix elements and antenna functions is presented with specific examples of how such diagrams can be used in practical calculations.
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