Safe use of jet pull
Abstract Jet pull is an observable designed to probe colour flow between jets. Thus far, a particular projection of the pull vector, the pull angle, has been employed to distinguish colour flow between jets produced by a colour singlet or an octet decay. This is of particular importance in order to...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-01-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP01(2020)104 |
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| _version_ | 1832586121015459840 |
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| author | Andrew Larkoski Simone Marzani Chang Wu |
| author_facet | Andrew Larkoski Simone Marzani Chang Wu |
| author_sort | Andrew Larkoski |
| collection | DOAJ |
| description | Abstract Jet pull is an observable designed to probe colour flow between jets. Thus far, a particular projection of the pull vector, the pull angle, has been employed to distinguish colour flow between jets produced by a colour singlet or an octet decay. This is of particular importance in order to separate the decay of a Higgs boson to a pair of bottom quarks from the QCD background. However, the pull angle is not infra-red and collinear (IRC) safe. In this paper we introduce IRC safe projections of the pull vector that exhibit good sensitivity to colour flow, while maintaining calculability. We calculate these distributions to next-to- leading logarithmic accuracy, in the context of the hadronic decay of a Higgs boson, and compare these results to Monte Carlo simulations. This study allows us to define an IRC safe version of the pull angle in terms of asymmetry distributions. Furthermore, because of their sensitivity to wide-angle soft radiation, we anticipate that these asymmetries can play an important role in assessing subleading colour correlations and their modelling in general-purpose Monte Carlo parton showers. |
| format | Article |
| id | doaj-art-46386b2d0f4e4d55970580db1235c2ea |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-46386b2d0f4e4d55970580db1235c2ea2025-01-26T12:11:15ZengSpringerOpenJournal of High Energy Physics1029-84792020-01-012020112310.1007/JHEP01(2020)104Safe use of jet pullAndrew Larkoski0Simone Marzani1Chang Wu2Physics Department, Reed CollegeDipartimento di Fisica, Università di Genova and INFNDipartimento di Fisica, Università di Genova and INFNAbstract Jet pull is an observable designed to probe colour flow between jets. Thus far, a particular projection of the pull vector, the pull angle, has been employed to distinguish colour flow between jets produced by a colour singlet or an octet decay. This is of particular importance in order to separate the decay of a Higgs boson to a pair of bottom quarks from the QCD background. However, the pull angle is not infra-red and collinear (IRC) safe. In this paper we introduce IRC safe projections of the pull vector that exhibit good sensitivity to colour flow, while maintaining calculability. We calculate these distributions to next-to- leading logarithmic accuracy, in the context of the hadronic decay of a Higgs boson, and compare these results to Monte Carlo simulations. This study allows us to define an IRC safe version of the pull angle in terms of asymmetry distributions. Furthermore, because of their sensitivity to wide-angle soft radiation, we anticipate that these asymmetries can play an important role in assessing subleading colour correlations and their modelling in general-purpose Monte Carlo parton showers.https://doi.org/10.1007/JHEP01(2020)104JetsQCD Phenomenology |
| spellingShingle | Andrew Larkoski Simone Marzani Chang Wu Safe use of jet pull Journal of High Energy Physics Jets QCD Phenomenology |
| title | Safe use of jet pull |
| title_full | Safe use of jet pull |
| title_fullStr | Safe use of jet pull |
| title_full_unstemmed | Safe use of jet pull |
| title_short | Safe use of jet pull |
| title_sort | safe use of jet pull |
| topic | Jets QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP01(2020)104 |
| work_keys_str_mv | AT andrewlarkoski safeuseofjetpull AT simonemarzani safeuseofjetpull AT changwu safeuseofjetpull |