Improving methods and predictions at high-energy e + e − colliders within collinear factorisation
Abstract We illustrate how electron Parton Distribution Functions (PDFs) with next-to-leading collinear logarithmic accuracy must be employed in the context of perturbative predictions for high-energy e + e − -collision processes. In particular, we discuss how the renormalisation group equation evol...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-10-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP10(2022)089 |
| _version_ | 1811182255526117376 |
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| author | V. Bertone M. Cacciari S. Frixione G. Stagnitto M. Zaro X. Zhao |
| author_facet | V. Bertone M. Cacciari S. Frixione G. Stagnitto M. Zaro X. Zhao |
| author_sort | V. Bertone |
| collection | DOAJ |
| description | Abstract We illustrate how electron Parton Distribution Functions (PDFs) with next-to-leading collinear logarithmic accuracy must be employed in the context of perturbative predictions for high-energy e + e − -collision processes. In particular, we discuss how the renormalisation group equation evolution of such PDFs is affected by the presence of multiple fermion families and their respective mass thresholds, and by the dependences on the choices of the factorisation and renormalisation schemes. We study the impact of the uncertainties associated with the PDFs on physical cross sections, in order to arrive at realistic precision estimates for observables computed with collinear-factorisation formulae. We do so by presenting results for the production of a heavy neutral object as well as for t t ¯ $$ t\overline{t} $$ and W + W − pairs, including next-to-leading-order effects of electroweak origin. |
| first_indexed | 2024-04-11T09:29:39Z |
| format | Article |
| id | doaj.art-fb6a1196ffd44da1ad2e528ee61e3394 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-04-11T09:29:39Z |
| publishDate | 2022-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-fb6a1196ffd44da1ad2e528ee61e33942022-12-22T04:31:56ZengSpringerOpenJournal of High Energy Physics1029-84792022-10-0120221016010.1007/JHEP10(2022)089Improving methods and predictions at high-energy e + e − colliders within collinear factorisationV. Bertone0M. Cacciari1S. Frixione2G. Stagnitto3M. Zaro4X. Zhao5IRFU, CEA, Université Paris-SaclaySorbonne Université, CNRS, Laboratoire de Physique Thórique et Hautes Énergies, LPTHEINFN, Sezione di GenovaPhysik-Institut, Universität ZürichTIFLab, Università degli Studi di Milano and INFN, Sezione di MilanoDipartimento di Matematica e Fisica, Università di Roma Tre and INFN, Sezione di Roma TreAbstract We illustrate how electron Parton Distribution Functions (PDFs) with next-to-leading collinear logarithmic accuracy must be employed in the context of perturbative predictions for high-energy e + e − -collision processes. In particular, we discuss how the renormalisation group equation evolution of such PDFs is affected by the presence of multiple fermion families and their respective mass thresholds, and by the dependences on the choices of the factorisation and renormalisation schemes. We study the impact of the uncertainties associated with the PDFs on physical cross sections, in order to arrive at realistic precision estimates for observables computed with collinear-factorisation formulae. We do so by presenting results for the production of a heavy neutral object as well as for t t ¯ $$ t\overline{t} $$ and W + W − pairs, including next-to-leading-order effects of electroweak origin.https://doi.org/10.1007/JHEP10(2022)089Higher Order Electroweak CalculationsPrecision QED |
| spellingShingle | V. Bertone M. Cacciari S. Frixione G. Stagnitto M. Zaro X. Zhao Improving methods and predictions at high-energy e + e − colliders within collinear factorisation Journal of High Energy Physics Higher Order Electroweak Calculations Precision QED |
| title | Improving methods and predictions at high-energy e + e − colliders within collinear factorisation |
| title_full | Improving methods and predictions at high-energy e + e − colliders within collinear factorisation |
| title_fullStr | Improving methods and predictions at high-energy e + e − colliders within collinear factorisation |
| title_full_unstemmed | Improving methods and predictions at high-energy e + e − colliders within collinear factorisation |
| title_short | Improving methods and predictions at high-energy e + e − colliders within collinear factorisation |
| title_sort | improving methods and predictions at high energy e e colliders within collinear factorisation |
| topic | Higher Order Electroweak Calculations Precision QED |
| url | https://doi.org/10.1007/JHEP10(2022)089 |
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