A new jet observable, dipolarity, is introduced that can distinguish whether a pair of subjets arises from a color singlet source. This observable is incorporated into the HEPTopTagger and is shown to improve discrimination between top jets and QCD jets for moderate to high pT.
@article{arxiv.1102.1012,
title = {Jet Dipolarity: Top Tagging with Color Flow},
author = {Anson Hook and Martin Jankowiak and Jay G. Wacker},
journal= {arXiv preprint arXiv:1102.1012},
year = {2015}
}