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Tagging highly boosted top quarks

Schätzel, Sebastian; Spannowsky, Michael

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Sebastian Schätzel


For highly energetic top quarks, the products of the decay t→bqq ′ are collimated. The three-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 p T >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 −1 of 14 TeV LHC data.


Schätzel, S., & Spannowsky, M. (2014). Tagging highly boosted top quarks. Physical Review D, 89(1), Article 014007.

Journal Article Type Article
Publication Date Jan 10, 2014
Deposit Date Dec 12, 2014
Publicly Available Date Apr 13, 2015
Journal Physical Review D
Print ISSN 1550-7998
Electronic ISSN 1550-2368
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 89
Issue 1
Article Number 014007


Published Journal Article (490 Kb)

Copyright Statement
Reprinted with permission from the American Physical Society: Phys. Rev. D 89, 014007 © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.

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