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arXiv · 1301.1910

A QCD description of the ATLAS jet veto measurement

Y. Hatta·C. Marquet·C. Royon·G. Soyez·T. Ueda·D. Werder
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Abstract

We present a new QCD description of the ATLAS jet veto measurement, using the Banfi-Marchesini-Smye equation to constrain the inter-jet QCD radiation. This equation resums emissions of soft gluons at large angles, at leading-logarithmic accuracy, and accounts for both the so-called Sudakov and non-global logarithms. We show that this approach is able to reproduce, with no fitting parameters, the fraction of high-pT forward/backward di-jet events which do not contain additional hard emissions in the inter-jet rapidity range. We also compute the gap fraction in fixed-order perturbation theory to O(alpha_s^2) and show that the perturbative series is unstable at large rapidity intervals.

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Y. Hatta, C. Marquet, C. Royon, G. Soyez, T. Ueda, D. Werder. 2013-01-09. A QCD description of the ATLAS jet veto measurement. https://doi.org/10.1103/physrevd.87.054016

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