Tagging highly boosted top quarks

Schätzel, Sebastian; Spannowsky, Michael

Abstract

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.

Citation

Schätzel, S., & Spannowsky, M. (2014). Tagging highly boosted top quarks. Physical Review D, 89(1), Article 014007. https://doi.org/10.1103/physrevd.89.014007

• 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
• DOI: https://doi.org/10.1103/physrevd.89.014007