2020

An Optimal Observable for Color Singlet Identification

Buckley, Andy, Callea, Giuseppe, Larkoski, Andrew J. et al.

Understand

We present a novel approach to construct a color tagger, i.e.

an observable that is able to discriminate the decay of a color-singlet into two jets from a two-jet background in a different color configuration.
We do this by explicitly taking the ratio of the corresponding leading-order matrix elements in the soft limit, thus obtaining an observable that is provably optimal within our approximation.
We call this observable the "jet color ring" and we compare its performance to other color-sensitive observables such as jet pull and dipolarity.

Built on

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Similar

J.R. Forshaw, A. Kyrieleis, and M.H. Seymour, “Super-leading logarithms in non-global observables in QCD: Colour basis independent calculation,” JHEP 09
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Then

Andrew J. Larkoski and Jesse Thaler, “Unsafe but Calculable: Ratios of Angularities in Perturbative QCD,” JHEP 09
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2015
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2015
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2016
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