Electroweak input schemes and universal corrections in SMEFT
Abstract The choice of an electroweak (EW) input scheme is an important component of perturbative calculations in Standard Model Effective Field Theory (SMEFT). In this paper we perform a systematic study of three different EW input schemes in SMEFT, in particular those using the parameter sets {M W...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-07-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP07(2023)115 |
| _version_ | 1827781414994575360 |
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| author | Anke Biekötter Benjamin D. Pecjak Darren J. Scott Tommy Smith |
| author_facet | Anke Biekötter Benjamin D. Pecjak Darren J. Scott Tommy Smith |
| author_sort | Anke Biekötter |
| collection | DOAJ |
| description | Abstract The choice of an electroweak (EW) input scheme is an important component of perturbative calculations in Standard Model Effective Field Theory (SMEFT). In this paper we perform a systematic study of three different EW input schemes in SMEFT, in particular those using the parameter sets {M W , M Z , G F }, {M W , M Z , α}, or {α, M Z , G F }. We discuss general features and calculate decay rates of Z and W bosons to leptons and Higgs decays to bottom quarks in these three schemes up to next-to-leading order (NLO) in dimension-six SMEFT. We explore the sensitivity to Wilson coefficients and perturbative convergence in the different schemes, and show that while the latter point is more involved than in the Standard Model, the dominant scheme-dependent NLO corrections are universal and can be taken into account by a simple set of substitutions on the leading-order results. Residual NLO corrections are then of similar size between the different input schemes, and performing calculations in multiple schemes can give a useful handle on theory uncertainties in SMEFT predictions and fits to data. |
| first_indexed | 2024-03-11T15:18:27Z |
| format | Article |
| id | doaj.art-aeb80ab03caf49f38f7cf52264411702 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-11T15:18:27Z |
| publishDate | 2023-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-aeb80ab03caf49f38f7cf522644117022023-10-29T12:06:31ZengSpringerOpenJournal of High Energy Physics1029-84792023-07-012023715810.1007/JHEP07(2023)115Electroweak input schemes and universal corrections in SMEFTAnke Biekötter0Benjamin D. Pecjak1Darren J. Scott2Tommy Smith3PRISMA+ Cluster of Excellence & MITP, Johannes Gutenberg UniversityInstitute for Particle Physics Phenomenology, Durham UniversityMax-Planck-Institut für PhysikInstitute for Particle Physics Phenomenology, Durham UniversityAbstract The choice of an electroweak (EW) input scheme is an important component of perturbative calculations in Standard Model Effective Field Theory (SMEFT). In this paper we perform a systematic study of three different EW input schemes in SMEFT, in particular those using the parameter sets {M W , M Z , G F }, {M W , M Z , α}, or {α, M Z , G F }. We discuss general features and calculate decay rates of Z and W bosons to leptons and Higgs decays to bottom quarks in these three schemes up to next-to-leading order (NLO) in dimension-six SMEFT. We explore the sensitivity to Wilson coefficients and perturbative convergence in the different schemes, and show that while the latter point is more involved than in the Standard Model, the dominant scheme-dependent NLO corrections are universal and can be taken into account by a simple set of substitutions on the leading-order results. Residual NLO corrections are then of similar size between the different input schemes, and performing calculations in multiple schemes can give a useful handle on theory uncertainties in SMEFT predictions and fits to data.https://doi.org/10.1007/JHEP07(2023)115SMEFTElectroweak Precision Physics |
| spellingShingle | Anke Biekötter Benjamin D. Pecjak Darren J. Scott Tommy Smith Electroweak input schemes and universal corrections in SMEFT Journal of High Energy Physics SMEFT Electroweak Precision Physics |
| title | Electroweak input schemes and universal corrections in SMEFT |
| title_full | Electroweak input schemes and universal corrections in SMEFT |
| title_fullStr | Electroweak input schemes and universal corrections in SMEFT |
| title_full_unstemmed | Electroweak input schemes and universal corrections in SMEFT |
| title_short | Electroweak input schemes and universal corrections in SMEFT |
| title_sort | electroweak input schemes and universal corrections in smeft |
| topic | SMEFT Electroweak Precision Physics |
| url | https://doi.org/10.1007/JHEP07(2023)115 |
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