A framework for simultaneous fit of QCD and BSM parameters with xFitter
Abstract An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters. This extension enables simultaneous determination of parton distribution functions (PDFs) and new ph...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2024-11-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-024-13585-w |
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| _version_ | 1846100960522272768 |
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| author | Xiao-Min Shen Simone Amoroso Jun Gao Katerina Lipka Oleksandr Zenaiev |
| author_facet | Xiao-Min Shen Simone Amoroso Jun Gao Katerina Lipka Oleksandr Zenaiev |
| author_sort | Xiao-Min Shen |
| collection | DOAJ |
| description | Abstract An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters. This extension enables simultaneous determination of parton distribution functions (PDFs) and new physics parameters within the framework of the Standard Model Effective Field Theory (SMEFT). The functionalities of the code are illustrated in a sensitivity study, where a simultaneous determination of the PDFs, top quark mass and the couplings of selected dimension-6 SMEFT operators is addressed using projections for measurements of top quark-antiquark pair production at the High-Luminosity LHC. The importance of considering all the correlations of the parton distributions, top quark mass and the SMEFT parameters in a simultaneous QCD+SMEFT analysis is demonstrated. This work serves as a new platform for simultaneous extraction of the PDFs and the SM/SMEFT parameters based on xFitter. |
| format | Article |
| id | doaj-art-2c77c7e1c78e41cab3df049ca2ddaa30 |
| institution | Kabale University |
| issn | 1434-6052 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj-art-2c77c7e1c78e41cab3df049ca2ddaa302024-12-29T12:43:28ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522024-11-01841111910.1140/epjc/s10052-024-13585-wA framework for simultaneous fit of QCD and BSM parameters with xFitterXiao-Min Shen0Simone Amoroso1Jun Gao2Katerina Lipka3Oleksandr Zenaiev4Deutsches Elektronen-Synchrotron DESYDeutsches Elektronen-Synchrotron DESYINPAC, Shanghai Key Laboratory for Particle Physics and Cosmology, School of Physics and Astronomy, Shanghai Jiao-Tong UniversityDeutsches Elektronen-Synchrotron DESYInstitute for Theoretical Physics, Hamburg UniversityAbstract An extension of the xFitter open-source program for QCD analyses is presented, allowing for a polynomial parameterization of the dependence of physical observables on theoretical parameters. This extension enables simultaneous determination of parton distribution functions (PDFs) and new physics parameters within the framework of the Standard Model Effective Field Theory (SMEFT). The functionalities of the code are illustrated in a sensitivity study, where a simultaneous determination of the PDFs, top quark mass and the couplings of selected dimension-6 SMEFT operators is addressed using projections for measurements of top quark-antiquark pair production at the High-Luminosity LHC. The importance of considering all the correlations of the parton distributions, top quark mass and the SMEFT parameters in a simultaneous QCD+SMEFT analysis is demonstrated. This work serves as a new platform for simultaneous extraction of the PDFs and the SM/SMEFT parameters based on xFitter.https://doi.org/10.1140/epjc/s10052-024-13585-w |
| spellingShingle | Xiao-Min Shen Simone Amoroso Jun Gao Katerina Lipka Oleksandr Zenaiev A framework for simultaneous fit of QCD and BSM parameters with xFitter European Physical Journal C: Particles and Fields |
| title | A framework for simultaneous fit of QCD and BSM parameters with xFitter |
| title_full | A framework for simultaneous fit of QCD and BSM parameters with xFitter |
| title_fullStr | A framework for simultaneous fit of QCD and BSM parameters with xFitter |
| title_full_unstemmed | A framework for simultaneous fit of QCD and BSM parameters with xFitter |
| title_short | A framework for simultaneous fit of QCD and BSM parameters with xFitter |
| title_sort | framework for simultaneous fit of qcd and bsm parameters with xfitter |
| url | https://doi.org/10.1140/epjc/s10052-024-13585-w |
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