The top quark legacy of the LHC Run II for PDF and SMEFT analyses
Abstract We assess the impact of top quark production at the LHC on global analyses of parton distributions (PDFs) and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. We consider the broadest top quark dataset to date containing all available meas...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2023-05-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP05(2023)205 |
| _version_ | 1797736449585446912 |
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| author | Zahari Kassabov Maeve Madigan Luca Mantani James Moore Manuel Morales Alvarado Juan Rojo Maria Ubiali |
| author_facet | Zahari Kassabov Maeve Madigan Luca Mantani James Moore Manuel Morales Alvarado Juan Rojo Maria Ubiali |
| author_sort | Zahari Kassabov |
| collection | DOAJ |
| description | Abstract We assess the impact of top quark production at the LHC on global analyses of parton distributions (PDFs) and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. We consider the broadest top quark dataset to date containing all available measurements based on the full Run II luminosity. First, we determine the constraints that this dataset provides on the large-x gluon PDF and study its consistency with other gluon-sensitive measurements. Second, we carry out a SMEFT interpretation of the same dataset using state-of-the-art SM and EFT theory cal- culations, resulting in bounds on 25 Wilson coefficients modifying top quark interactions. Subsequently, we integrate the two analyses within the SIMUnet approach to realise a simul- taneous determination of the SMEFT PDFs and the EFT coefficients and identify regions in the parameter space where their interplay is most phenomenologically relevant. We also demonstrate how to separate eventual BSM signals from QCD effects in the interpretation of top quark measurements at the LHC. |
| first_indexed | 2024-03-12T13:14:06Z |
| format | Article |
| id | doaj.art-0558afd1a6f04c9da52fecadaf249218 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-03-12T13:14:06Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-0558afd1a6f04c9da52fecadaf2492182023-08-27T11:05:42ZengSpringerOpenJournal of High Energy Physics1029-84792023-05-012023517510.1007/JHEP05(2023)205The top quark legacy of the LHC Run II for PDF and SMEFT analysesZahari Kassabov0Maeve Madigan1Luca Mantani2James Moore3Manuel Morales Alvarado4Juan Rojo5Maria Ubiali6DAMTP, University of CambridgeDAMTP, University of CambridgeDAMTP, University of CambridgeDAMTP, University of CambridgeDAMTP, University of CambridgeDepartment of Physics and Astronomy, Vrije UniversiteitDAMTP, University of CambridgeAbstract We assess the impact of top quark production at the LHC on global analyses of parton distributions (PDFs) and of Wilson coefficients in the SMEFT, both separately and in the framework of a joint interpretation. We consider the broadest top quark dataset to date containing all available measurements based on the full Run II luminosity. First, we determine the constraints that this dataset provides on the large-x gluon PDF and study its consistency with other gluon-sensitive measurements. Second, we carry out a SMEFT interpretation of the same dataset using state-of-the-art SM and EFT theory cal- culations, resulting in bounds on 25 Wilson coefficients modifying top quark interactions. Subsequently, we integrate the two analyses within the SIMUnet approach to realise a simul- taneous determination of the SMEFT PDFs and the EFT coefficients and identify regions in the parameter space where their interplay is most phenomenologically relevant. We also demonstrate how to separate eventual BSM signals from QCD effects in the interpretation of top quark measurements at the LHC.https://doi.org/10.1007/JHEP05(2023)205Top QuarkParton DistributionsSMEFT |
| spellingShingle | Zahari Kassabov Maeve Madigan Luca Mantani James Moore Manuel Morales Alvarado Juan Rojo Maria Ubiali The top quark legacy of the LHC Run II for PDF and SMEFT analyses Journal of High Energy Physics Top Quark Parton Distributions SMEFT |
| title | The top quark legacy of the LHC Run II for PDF and SMEFT analyses |
| title_full | The top quark legacy of the LHC Run II for PDF and SMEFT analyses |
| title_fullStr | The top quark legacy of the LHC Run II for PDF and SMEFT analyses |
| title_full_unstemmed | The top quark legacy of the LHC Run II for PDF and SMEFT analyses |
| title_short | The top quark legacy of the LHC Run II for PDF and SMEFT analyses |
| title_sort | top quark legacy of the lhc run ii for pdf and smeft analyses |
| topic | Top Quark Parton Distributions SMEFT |
| url | https://doi.org/10.1007/JHEP05(2023)205 |
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