The anti-k_t algorithm yields conical jets with equal active and passive areas, zero area anomalous dimensions, rigid-boundary non-global logarithms, and a universal Milan factor, serving as an IRC-safe substitute for the iterative cone algorithm.
The Catchment Area of Jets
6 Pith papers cite this work. Polarity classification is still indexing.
6
Pith papers citing it
abstract
The area of a jet is a measure of its susceptibility to radiation, like pileup or underlying event (UE), that on average, in the jet's neighbourhood, is uniform in rapidity and azimuth. In this article we establish a theoretical grounding for the discussion of jet areas, introducing two main definitions, passive and active areas, which respectively characterise the sensitivity to pointlike or diffuse pileup and UE radiation. We investigate the properties of jet areas for three standard jet algorithms, k_t, Cambridge/Aachen and SISCone. Passive areas for single-particle jets are equal to the naive geometrical expectation \pi R^2, but acquire an anomalous dimension at higher orders in the coupling, calculated here at leading order. The more physically relevant active areas differ from \pi R^2 even for single-particle jets, substantially so in the case of the cone algorithms like SISCone with a Tevatron Run-II split--merge procedure. We compare our results with direct measures of areas in parton-shower Monte Carlo simulations and find good agreement with the main features of the analytical predictions. We furthermore justify the use of jet areas to subtract the contamination from pileup.
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representative citing papers
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citing papers explorer
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The anti-k_t jet clustering algorithm
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