Antenna subtraction for gluon scattering at NNLO

Details Antenna subtraction for gluon scattering at NNLO Antenna subtraction for gluon scattering at NNLO

2010-03-14

arxiv.org/abs/1003.2824v3

JHEP 1006:096,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

71 pages, JHEP3 class; corrected typos, equivalent but more compact version of eq. (5.12), results unchanged

Scientific paper

10.1007/JHEP06(2010)096

We use the antenna subtraction method to isolate the double real radiation infrared singularities present in gluonic scattering amplitudes at next-to-next-to-leading order. The antenna subtraction framework has been successfully applied to the calculation of NNLO corrections to the 3-jet cross section and related event shape distributions in electron-positron annihilation. Here we consider processes with two coloured particles in the initial state, and in particular two-jet production at hadron colliders such as the Large Hadron Collider (LHC). We construct a subtraction term that describes the single and double unresolved contributions from the six-gluon tree-level process using antenna functions with initial state partons and show numerically that the subtraction term correctly approximates the matrix elements in the various single and double unresolved configurations.

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