Top Tagging: A Method for Identifying Boosted Hadronically Decaying Top Quarks
Journal Article
·
· Physical Review Letters
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218 (United States)
A method is introduced for distinguishing top jets (boosted, hadronically decaying top quarks) from light-quark and gluon jets using jet substructure. The procedure involves parsing the jet cluster to resolve its subjets and then imposing kinematic constraints. With this method, light-quark or gluon jets with p{sub T}{approx_equal}1 TeV can be rejected with an efficiency of around 99% while retaining up to 40% of top jets. This reduces the dijet background to heavy tt resonances by a factor of {approx}10 000, thereby allowing resonance searches in tt to be extended into the all-hadronic channel. In addition, top tagging can be used in tt events when one of the top quarks decays semileptonically, in events with missing energy, and in studies of b-tagging efficiency at high p{sub T}.
- OSTI ID:
- 21179767
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 14 Vol. 101; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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