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....
| Main Authors: | , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2016
|
| Online Access: | http://hdl.handle.net/1721.1/103301 https://orcid.org/0000-0002-3181-4301 https://orcid.org/0000-0002-4819-4081 https://orcid.org/0000-0002-5290-8315 |
| _version_ | 1826190193495900160 |
|---|---|
| author | Moult, Ian Larkoski, Andrew J. Neill, Duff Austin |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Moult, Ian Larkoski, Andrew J. Neill, Duff Austin |
| author_sort | Moult, Ian |
| collection | MIT |
| description | 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 all-orders factorization theorem for a two-prong 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 zero-bin 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 two-prong QCD jets, and informs their usage in substructure analyses. Our calculation also provides considerable insight into the discrimination power and calculability of jet substructure observables in general. |
| first_indexed | 2024-09-23T08:36:30Z |
| format | Article |
| id | mit-1721.1/103301 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:36:30Z |
| publishDate | 2016 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1033012022-09-30T09:57:44Z Analytic boosted boson discrimination Moult, Ian Larkoski, Andrew J. Neill, Duff Austin Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Neill, Duff Austin Moult, Ian Larkoski, Andrew J. 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 all-orders factorization theorem for a two-prong 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 zero-bin 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 two-prong QCD jets, and informs their usage in substructure analyses. Our calculation also provides considerable insight into the discrimination power and calculability of jet substructure observables in general. United States. Department of Energy (Contract Numbers DE-SC00012567 and DE-SC0011090) MIT Department of Physics Pappalardo Program Natural Sciences and Engineering Research Council of Canada 2016-06-23T19:40:22Z 2016-06-23T19:40:22Z 2016-05 2015-09 2016-05-23T11:07:15Z Article http://purl.org/eprint/type/JournalArticle 1029-8479 1126-6708 http://hdl.handle.net/1721.1/103301 Larkoski, Andrew J., Ian Moult, and Duff Neill. “Analytic Boosted Boson Discrimination.” Journal of High Energy Physics 2016.5 (2016): n. pag. https://orcid.org/0000-0002-3181-4301 https://orcid.org/0000-0002-4819-4081 https://orcid.org/0000-0002-5290-8315 en http://dx.doi.org/10.1007/JHEP05(2016)117 Journal of High Energy Physics Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Moult, Ian Larkoski, Andrew J. Neill, Duff Austin Analytic boosted boson discrimination |
| title | Analytic boosted boson discrimination |
| title_full | Analytic boosted boson discrimination |
| title_fullStr | Analytic boosted boson discrimination |
| title_full_unstemmed | Analytic boosted boson discrimination |
| title_short | Analytic boosted boson discrimination |
| title_sort | analytic boosted boson discrimination |
| url | http://hdl.handle.net/1721.1/103301 https://orcid.org/0000-0002-3181-4301 https://orcid.org/0000-0002-4819-4081 https://orcid.org/0000-0002-5290-8315 |
| work_keys_str_mv | AT moultian analyticboostedbosondiscrimination AT larkoskiandrewj analyticboostedbosondiscrimination AT neillduffaustin analyticboostedbosondiscrimination |