Tagging highly boosted top quarks
Abstract
For highly energetic top quarks, the products of the decay t->bqq' are collimated. The 3-prong decay structure can no longer be resolved using calorimeter information alone if the particle jet separation approaches the calorimeter granularity. We propose a new method, the HPTTopTagger, that uses tracks of charged particles inside a fat jet to find top quarks with transverse momentum pT >1 TeV. The tracking information is complemented by the calorimeter measurement of the fat jet energy to eliminate the sensitivity to jet-to-jet fluctuations in the charged-to-neutral particle ratio. We show that with the HPTTopTagger, a leptophobic narrow-mass Z' boson of mass 3 TeV could be found using 300/fb of 14 TeV LHC data.
Keywords
Cite
@article{arxiv.1308.0540,
title = {Tagging highly boosted top quarks},
author = {Sebastian Schaetzel and Michael Spannowsky},
journal= {arXiv preprint arXiv:1308.0540},
year = {2014}
}
Comments
journal version with additional plots and link to source code