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arXiv · 1201.2688

Angular Scaling in Jets

Martin Jankowiak·Andrew J. Larkoski
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Abstract

We introduce a jet shape observable defined for an ensemble of jets in terms of two-particle angular correlations and a resolution parameter R. This quantity is infrared and collinear safe and can be interpreted as a scaling exponent for the angular distribution of mass inside the jet. For small R it is close to the value 2 as a consequence of the approximately scale invariant QCD dynamics. For large R it is sensitive to non-perturbative effects. We describe the use of this correlation function for tests of QCD, for studying underlying event and pile-up effects, and for tuning Monte Carlo event generators.

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Martin Jankowiak, Andrew J. Larkoski. 2012-04-06. Angular Scaling in Jets. https://doi.org/10.1007/jhep04(2012)039

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