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Tagging highly boosted top quarks.

Schätzel, Sebastian and Spannowsky, Michael (2014) 'Tagging highly boosted top quarks.', Physical review D., 89 (1). 014007.


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.

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Publisher 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.
Date accepted:No date available
Date deposited:13 April 2015
Date of first online publication:January 2014
Date first made open access:No date available

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