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Infrared sensitivity of single jet inclusive production at hadron colliders.

Currie, James and Gehrmann-De Ridder, Aude and Gehrmann, Thomas and Glover, Nigel and Huss, Alexander and Pires, João (2018) 'Infrared sensitivity of single jet inclusive production at hadron colliders.', Journal of high energy physics., 2018 (10). p. 155.


Jet production at hadron colliders is a benchmark process to probe the dynamics of the strong interaction and the structure of the colliding hadrons. One of the most basic jet production observables is the single jet inclusive cross section, which is obtained by summing all jets that are observed in an event. Our recent computation of next-to-next-to-leading order (NNLO) QCD contributions to single jet inclusive observables uncovered large corrections in certain kinematical regions, which also resulted in a sizeable ambiguity on the appropriate choice of renormalization and factorization scales. We now perform a detailed investigation of the infrared sensitivity of the different ingredients to the single jet inclusive cross section. We show that the contribution from the second jet, ordered in transverse momentum pT, in the event is particularly sensitive to higher order effects due to implicit restrictions on its kinematics. By investigating the second-jet transverse momentum distribution, we identify large-scale cancellations between different kinematical event configurations, which are aggravated by certain types of scale choice. Taking perturbative convergence and stability as selection criteria enables us to single out the total partonic transverse energy ĤT and twice the individual jet transverse momentum 2 pT (with which ĤT coincides in Born kinematics) as the most appropriate scales in the perturbative description of single jet inclusive production.

Item Type:Article
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Publisher statement:Open Access, © The Author(s) 2018 This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Date accepted:10 September 2018
Date deposited:08 November 2018
Date of first online publication:25 October 2018
Date first made open access:08 November 2018

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