A framework for simultaneous fit of QCD and BSM parameters with xFitter
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2024
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866916500171915264 |
|---|---|
| author | Shen, XiaoMin Amoroso, Simone Gao, Jun Lipka, Katerina Zenaiev, Oleksandr |
| author_facet | Shen, XiaoMin Amoroso, Simone Gao, Jun Lipka, Katerina Zenaiev, Oleksandr |
| contents | 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 EFT 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 | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16061 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | A framework for simultaneous fit of QCD and BSM parameters with xFitter Shen, XiaoMin Amoroso, Simone Gao, Jun Lipka, Katerina Zenaiev, Oleksandr High Energy Physics - Phenomenology 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 EFT 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. |
| title | A framework for simultaneous fit of QCD and BSM parameters with xFitter |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.16061 |