Secondary Lund jet plane as a gluon-enriched sample
Abstract We propose a new strategy to obtain a high-purity sample of gluon-initiated jets at the LHC. Our approach, inspired by the Lund jet plane picture, is to perform a dijet selection where the two jets are collinear to each other and their momentum fraction share is highly asymmetric, and to me...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-07-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP07(2025)088 |
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| author | Cristian Baldenegro Alba Soto-Ontoso Gregory Soyez |
| author_facet | Cristian Baldenegro Alba Soto-Ontoso Gregory Soyez |
| author_sort | Cristian Baldenegro |
| collection | DOAJ |
| description | Abstract We propose a new strategy to obtain a high-purity sample of gluon-initiated jets at the LHC. Our approach, inspired by the Lund jet plane picture, is to perform a dijet selection where the two jets are collinear to each other and their momentum fraction share is highly asymmetric, and to measure the primary Lund plane density of emissions of the subleading jet. The subleading jet in this topology is practically equivalent to a secondary Lund jet plane. We demonstrate by means of fixed-order calculations that such a simple setup yields (Born-level) gluon jet fractions of around 90% for the subleading jet for both quark- and gluon-initiated jets. This observation is confirmed using hadron-level Monte Carlo generated events. We also show that the extracted gluon purities are highly resilient to the overall colour structure of the event, to the flavour of the hard-scattering process, and to the parton distribution functions. This strategy is well-suited for constraining the radiation pattern of gluon-initiated jets using a set of fiducial cuts that can readily be tested at the LHC, without relying on taggers or statistical demixing. |
| format | Article |
| id | doaj-art-176f7510c8f94facb718bc03cb32a5d9 |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-176f7510c8f94facb718bc03cb32a5d92025-08-20T03:45:44ZengSpringerOpenJournal of High Energy Physics1029-84792025-07-012025712410.1007/JHEP07(2025)088Secondary Lund jet plane as a gluon-enriched sampleCristian Baldenegro0Alba Soto-Ontoso1Gregory Soyez2Massachusetts Institute of Technology, Laboratory for Nuclear ScienceDepartamento de Física Teórica y del Cosmos, Universidad de GranadaUniversité Paris-Saclay, CNRS, CEA, Institut de physique théoriqueAbstract We propose a new strategy to obtain a high-purity sample of gluon-initiated jets at the LHC. Our approach, inspired by the Lund jet plane picture, is to perform a dijet selection where the two jets are collinear to each other and their momentum fraction share is highly asymmetric, and to measure the primary Lund plane density of emissions of the subleading jet. The subleading jet in this topology is practically equivalent to a secondary Lund jet plane. We demonstrate by means of fixed-order calculations that such a simple setup yields (Born-level) gluon jet fractions of around 90% for the subleading jet for both quark- and gluon-initiated jets. This observation is confirmed using hadron-level Monte Carlo generated events. We also show that the extracted gluon purities are highly resilient to the overall colour structure of the event, to the flavour of the hard-scattering process, and to the parton distribution functions. This strategy is well-suited for constraining the radiation pattern of gluon-initiated jets using a set of fiducial cuts that can readily be tested at the LHC, without relying on taggers or statistical demixing.https://doi.org/10.1007/JHEP07(2025)088Jets and Jet SubstructureParton Shower |
| spellingShingle | Cristian Baldenegro Alba Soto-Ontoso Gregory Soyez Secondary Lund jet plane as a gluon-enriched sample Journal of High Energy Physics Jets and Jet Substructure Parton Shower |
| title | Secondary Lund jet plane as a gluon-enriched sample |
| title_full | Secondary Lund jet plane as a gluon-enriched sample |
| title_fullStr | Secondary Lund jet plane as a gluon-enriched sample |
| title_full_unstemmed | Secondary Lund jet plane as a gluon-enriched sample |
| title_short | Secondary Lund jet plane as a gluon-enriched sample |
| title_sort | secondary lund jet plane as a gluon enriched sample |
| topic | Jets and Jet Substructure Parton Shower |
| url | https://doi.org/10.1007/JHEP07(2025)088 |
| work_keys_str_mv | AT cristianbaldenegro secondarylundjetplaneasagluonenrichedsample AT albasotoontoso secondarylundjetplaneasagluonenrichedsample AT gregorysoyez secondarylundjetplaneasagluonenrichedsample |