Soft spin correlations in final-state parton showers
Abstract We introduce a simple procedure that resolves the long-standing question of how to account for single-logarithmic spin-correlation effects in parton showers not just in the collinear limit, but also in the soft wide-angle limit, at leading colour. We discuss its implementation in the contex...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-03-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP03(2022)193 |
| _version_ | 1828289487145271296 |
|---|---|
| author | Keith Hamilton Alexander Karlberg Gavin P. Salam Ludovic Scyboz Rob Verheyen |
| author_facet | Keith Hamilton Alexander Karlberg Gavin P. Salam Ludovic Scyboz Rob Verheyen |
| author_sort | Keith Hamilton |
| collection | DOAJ |
| description | Abstract We introduce a simple procedure that resolves the long-standing question of how to account for single-logarithmic spin-correlation effects in parton showers not just in the collinear limit, but also in the soft wide-angle limit, at leading colour. We discuss its implementation in the context of the PanScales family of parton showers, where it complements our earlier treatment of the purely collinear spin correlations. Comparisons to fixed-order matrix elements help validate our approach up to third order in the strong coupling, and an appendix demonstrates the small size of residual subleading-colour effects. To help probe wide-angle soft spin correlation effects, we introduce a new declustering-based non-global spin-sensitive observable, the first of its kind. Our showers provide a reference for its single-logarithmic resummation. The work in this paper represents the last step required for final-state massless showers to satisfy the broad PanScales next-to-leading logarithmic accuracy goals. |
| first_indexed | 2024-04-13T10:21:52Z |
| format | Article |
| id | doaj.art-76513f7c37d54039a67565ae8c80d757 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-13T10:21:52Z |
| publishDate | 2022-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-76513f7c37d54039a67565ae8c80d7572022-12-22T02:50:27ZengSpringerOpenJournal of High Energy Physics1029-84792022-03-012022312710.1007/JHEP03(2022)193Soft spin correlations in final-state parton showersKeith Hamilton0Alexander Karlberg1Gavin P. Salam2Ludovic Scyboz3Rob Verheyen4Department of Physics and Astronomy, University College LondonRudolf Peierls Centre for Theoretical Physics, Clarendon Laboratory, Parks Road, University of OxfordRudolf Peierls Centre for Theoretical Physics, Clarendon Laboratory, Parks Road, University of OxfordRudolf Peierls Centre for Theoretical Physics, Clarendon Laboratory, Parks Road, University of OxfordDepartment of Physics and Astronomy, University College LondonAbstract We introduce a simple procedure that resolves the long-standing question of how to account for single-logarithmic spin-correlation effects in parton showers not just in the collinear limit, but also in the soft wide-angle limit, at leading colour. We discuss its implementation in the context of the PanScales family of parton showers, where it complements our earlier treatment of the purely collinear spin correlations. Comparisons to fixed-order matrix elements help validate our approach up to third order in the strong coupling, and an appendix demonstrates the small size of residual subleading-colour effects. To help probe wide-angle soft spin correlation effects, we introduce a new declustering-based non-global spin-sensitive observable, the first of its kind. Our showers provide a reference for its single-logarithmic resummation. The work in this paper represents the last step required for final-state massless showers to satisfy the broad PanScales next-to-leading logarithmic accuracy goals.https://doi.org/10.1007/JHEP03(2022)193JetsQCD Phenomenology |
| spellingShingle | Keith Hamilton Alexander Karlberg Gavin P. Salam Ludovic Scyboz Rob Verheyen Soft spin correlations in final-state parton showers Journal of High Energy Physics Jets QCD Phenomenology |
| title | Soft spin correlations in final-state parton showers |
| title_full | Soft spin correlations in final-state parton showers |
| title_fullStr | Soft spin correlations in final-state parton showers |
| title_full_unstemmed | Soft spin correlations in final-state parton showers |
| title_short | Soft spin correlations in final-state parton showers |
| title_sort | soft spin correlations in final state parton showers |
| topic | Jets QCD Phenomenology |
| url | https://doi.org/10.1007/JHEP03(2022)193 |
| work_keys_str_mv | AT keithhamilton softspincorrelationsinfinalstatepartonshowers AT alexanderkarlberg softspincorrelationsinfinalstatepartonshowers AT gavinpsalam softspincorrelationsinfinalstatepartonshowers AT ludovicscyboz softspincorrelationsinfinalstatepartonshowers AT robverheyen softspincorrelationsinfinalstatepartonshowers |