Non-perturbative QCD effects in jets at hadron colliders

Details Non-perturbative QCD effects in jets at hadron colliders Non-perturbative QCD effects in jets at hadron colliders

2007-12-18

arxiv.org/abs/0712.3014v1

JHEP 0802:055,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

33 pages, 7 figures

Scientific paper

10.1088/1126-6708/2008/02/055

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.

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