Identifying boosted objects with N-subjettiness
We introduce a new jet shape—N-subjettiness—designed to identify boosted hadronically-decaying objects like electroweak bosons and top quarks. Combined with a jet invariant mass cut, N-subjettiness is an effective discriminating variable for tagging boosted objects and rejecting the background of...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Springer-Verlag
2012
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| Online Access: | http://hdl.handle.net/1721.1/72041 https://orcid.org/0000-0002-2406-8160 |
| Summary: | We introduce a new jet shape—N-subjettiness—designed to identify boosted
hadronically-decaying objects like electroweak bosons and top quarks. Combined with a
jet invariant mass cut, N-subjettiness is an effective discriminating variable for tagging
boosted objects and rejecting the background of QCD jets with large invariant mass. In
efficiency studies of boosted W bosons and top quarks, we find tagging efficiencies of 30%
are achievable with fake rates of 1%. We also consider the discovery potential for new
heavy resonances that decay to pairs of boosted objects, and find significant improvements
are possible using N-subjettiness. In this way, N-subjettiness combines the advantages of
jet shapes with the discriminating power seen in previous jet substructure algorithms. |
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