NNLO beam functions for angularity distributions
Abstract The popular class of angularity event shapes provides a wealth of information on the hadronic final-state distribution in collider events. While initially proposed for e + e − collisions, angularities have more recently attracted considerable interest as a jet substructure observable at had...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-03-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP03(2025)088 |
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| _version_ | 1850187389503275008 |
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| author | Guido Bell Kevin Brune Goutam Das Marcel Wald |
| author_facet | Guido Bell Kevin Brune Goutam Das Marcel Wald |
| author_sort | Guido Bell |
| collection | DOAJ |
| description | Abstract The popular class of angularity event shapes provides a wealth of information on the hadronic final-state distribution in collider events. While initially proposed for e + e − collisions, angularities have more recently attracted considerable interest as a jet substructure observable at hadron colliders. Moreover, angularities can be measured as a global event shape in deep inelastic electron-nucleon scattering (DIS), and the respective factorisation theorem contains a beam function that parametrises the collinear initial-state radiation. In the present work, we compute the quark and gluon beam functions for seven different angularities to next-to-next-to-leading order (NNLO) in the strong-coupling expansion. Our calculation is based on an automated framework that was previously developed for SCET-2 observables, and which we transfer in the current work to the generic SCET-1 case. Our results are relevant for resumming DIS angularity distributions at NNLL′ accuracy. |
| format | Article |
| id | doaj-art-d615151e49c341edbe39597c10e8de4d |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-d615151e49c341edbe39597c10e8de4d2025-08-20T02:16:06ZengSpringerOpenJournal of High Energy Physics1029-84792025-03-012025311910.1007/JHEP03(2025)088NNLO beam functions for angularity distributionsGuido Bell0Kevin Brune1Goutam Das2Marcel Wald3Theoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenTheoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenInstitut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen UniversityTheoretische Physik 1, Center for Particle Physics Siegen, Universität SiegenAbstract The popular class of angularity event shapes provides a wealth of information on the hadronic final-state distribution in collider events. While initially proposed for e + e − collisions, angularities have more recently attracted considerable interest as a jet substructure observable at hadron colliders. Moreover, angularities can be measured as a global event shape in deep inelastic electron-nucleon scattering (DIS), and the respective factorisation theorem contains a beam function that parametrises the collinear initial-state radiation. In the present work, we compute the quark and gluon beam functions for seven different angularities to next-to-next-to-leading order (NNLO) in the strong-coupling expansion. Our calculation is based on an automated framework that was previously developed for SCET-2 observables, and which we transfer in the current work to the generic SCET-1 case. Our results are relevant for resumming DIS angularity distributions at NNLL′ accuracy.https://doi.org/10.1007/JHEP03(2025)088Effective Field Theories of QCDHigher-Order Perturbative CalculationsResummation |
| spellingShingle | Guido Bell Kevin Brune Goutam Das Marcel Wald NNLO beam functions for angularity distributions Journal of High Energy Physics Effective Field Theories of QCD Higher-Order Perturbative Calculations Resummation |
| title | NNLO beam functions for angularity distributions |
| title_full | NNLO beam functions for angularity distributions |
| title_fullStr | NNLO beam functions for angularity distributions |
| title_full_unstemmed | NNLO beam functions for angularity distributions |
| title_short | NNLO beam functions for angularity distributions |
| title_sort | nnlo beam functions for angularity distributions |
| topic | Effective Field Theories of QCD Higher-Order Perturbative Calculations Resummation |
| url | https://doi.org/10.1007/JHEP03(2025)088 |
| work_keys_str_mv | AT guidobell nnlobeamfunctionsforangularitydistributions AT kevinbrune nnlobeamfunctionsforangularitydistributions AT goutamdas nnlobeamfunctionsforangularitydistributions AT marcelwald nnlobeamfunctionsforangularitydistributions |