Non-perturbative QCD effects in jets at hadron colliders

Abstract

We discuss non-perturbative QCD contributions to jet observables, computing their dependence on the jet radius R, and on the colour and transverse momentum of the parton initiating the jet. We show, using analytic QCD models of power corrections as well as Monte Carlo simulations, that hadronisation corrections grow at small values of R, behaving as 1/R, while underlying event contributions grow with the jet area as R^2. We highlight the connection between hadronisation corrections to jets and those for event shapes in e^+e^- and DIS; we note the limited dependence of our results on the choice of jet algorithm; finally, we propose several measurements in the context of which to test or implement our predictions. The results presented here reinforce the motivation for the use of a range of R values, as well as a plurality of infrared-safe jet algorithms, in precision jet studies at hadron colliders.

33 pages, 7 figures

References in corpus (5)

• Pileup subtraction using jet areas
• Hard Interactions of Quarks and Gluons: a Primer for LHC Physics
• Momentum Flow Correlations from Event Shapes: Factorized Soft Gluons and Soft-Collinear Effective Theory
• Resummed Cross Section for Jet Production at Hadron Colliders
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Cited by in corpus (4)

• Jet substructure as a new Higgs search channel at the LHC
• The Catchment Area of Jets
• Central exclusive production of dijets at hadronic colliders
• On the universality of hadronisation corrections to QCD jets