Analytic boosted boson discrimination
Observables which discriminate boosted topologies from massive QCD jets are of great importance for the success of the jet substructure program at the Large Hadron Collider. Such observables, while both widely and successfully used, have been studied almost exclusively with Monte Carlo simulations. In this paper we present the first allorders factorization theorem for a twoprong discriminant based on a jet shape variable, D _{2}, valid for both signal and background jets. Our factorization theorem simultaneously describes the production of both collinear and soft subjets, and we introduce a novel zerobin procedure to correctly describe the transition region between these limits. By proving an all orders factorization theorem, we enable a systematically improvable description, and allow for precision comparisons between data, Monte Carlo, and first principles QCD calculations for jet substructure observables. Using our factorization theorem, we present numerical results for the discrimination of a boosted Z boson from massive QCD background jets. We compare our results with Monte Carlo predictions which allows for a detailed understanding of the extent to which these generators accurately describe the formation of twoprong QCD jets, and informs their usage in substructure analyses. In conclusion, our calculation also provides considerable insight into the discriminationmore »
 Authors:

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 Massachusetts Institute of Technology, Cambridge, MA (United States)
 Publication Date:
 Grant/Contract Number:
 SC0012567; SC0011090
 Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 5; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Research Org:
 Massachusetts Institute of Technology, Cambridge, MA (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Jets; QCD Phenomenology
 OSTI Identifier:
 1326946
Larkoski, Andrew J., Moult, Ian, and Neill, Duff. Analytic boosted boson discrimination. United States: N. p.,
Web. doi:10.1007/JHEP05(2016)117.
Larkoski, Andrew J., Moult, Ian, & Neill, Duff. Analytic boosted boson discrimination. United States. doi:10.1007/JHEP05(2016)117.
Larkoski, Andrew J., Moult, Ian, and Neill, Duff. 2016.
"Analytic boosted boson discrimination". United States.
doi:10.1007/JHEP05(2016)117. https://www.osti.gov/servlets/purl/1326946.
@article{osti_1326946,
title = {Analytic boosted boson discrimination},
author = {Larkoski, Andrew J. and Moult, Ian and Neill, Duff},
abstractNote = {Observables which discriminate boosted topologies from massive QCD jets are of great importance for the success of the jet substructure program at the Large Hadron Collider. Such observables, while both widely and successfully used, have been studied almost exclusively with Monte Carlo simulations. In this paper we present the first allorders factorization theorem for a twoprong discriminant based on a jet shape variable, D2, valid for both signal and background jets. Our factorization theorem simultaneously describes the production of both collinear and soft subjets, and we introduce a novel zerobin procedure to correctly describe the transition region between these limits. By proving an all orders factorization theorem, we enable a systematically improvable description, and allow for precision comparisons between data, Monte Carlo, and first principles QCD calculations for jet substructure observables. Using our factorization theorem, we present numerical results for the discrimination of a boosted Z boson from massive QCD background jets. We compare our results with Monte Carlo predictions which allows for a detailed understanding of the extent to which these generators accurately describe the formation of twoprong QCD jets, and informs their usage in substructure analyses. In conclusion, our calculation also provides considerable insight into the discrimination power and calculability of jet substructure observables in general.},
doi = {10.1007/JHEP05(2016)117},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2016,
place = {United States},
year = {2016},
month = {5}
}