University of Cambridge > Talks.cam > HEP phenomenology joint Cavendish-DAMTP seminar > Jet substructure and top-taggers for highly boosted tops

Jet substructure and top-taggers for highly boosted tops

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We study, from the viewpoint of QCD , top taggers that exploit jet substructure for identifying highly boosted top quarks. To understand the problem we take the example of the CMS top tagger, one of the early standard methods introduced and used in experimental studies. We find that the tagger is IRC unsafe and modify it to make it amenable to our QCD studies while retaining the performance (signal significance) of the original CMS tagger. We then study the main factors that influence the performance of top taggers for high p_t top jets including the effects of radiation constraints imposed by the taggers on the signal and the QCD background, introduce new methods for top tagging, and highlight some directions for future studies.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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