Power corrections for jets at hadron colliders
Matteo Cacciari, Mrinal Dasgupta, Lorenzo Magnea, Gavin Salam
TL;DR
This paper analyzes non-perturbative QCD effects on jet distributions at hadron colliders, showing how hadronisation and underlying event contributions vary with jet radius and area, and proposing a way to parameterize them.
Contribution
It introduces a combined approach using soft gluon resummation and Monte Carlo models to distinguish and parametrize hadronisation and underlying event effects based on jet parameters.
Findings
Hadronisation effects scale as 1/R at small jet radius R.
Underlying event contributions increase with jet area.
Proposes a parametrization of non-perturbative effects in terms of measurable QCD parameters.
Abstract
We discuss non-perturbative QCD corrections to jet distributions in hadron collisions, focussing on hadronisation and underlying event contributions. Using soft gluon resummation and Monte-Carlo modelling we show that hadronisation dominates at small values of the jet radius R, behaving as 1/R, while underlying event corrections grow with the jet area. This provides a handle to disentangle them and parametrize them in terms of measurable QCD parameters, which might enjoy a degree of universality.
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