Preprint

PUBDB-2024-08013

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A framework for simultaneous fit of QCD and BSM parameters with xFitter

Shen, X. (Corresponding author)Extern*DESY* ; Amoroso, S.DESY* ; Gao, J. ; Lipka, K.DESY* ; Zenaiev, O.Extern*

2024

This record in other databases:    

Please use a persistent id in citations: doi:10.3204/PUBDB-2024-08013

Report No.: DESY-24-119; arXiv:2407.16061

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.

---

Contributing Institute(s):

1. LHC/CMS Experiment (CMS)
2. Uni Hamburg / Theorie (UNI/TH)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. LHC: CMS

Appears in the scientific report 2024

---

Database coverage:
; ; Published

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Shen, X. (Corresponding author)Extern* ; Amoroso, S.DESY* ; Gao, J. ; Lipka, K.DESY* ; Zenaiev, O.Extern*
A framework for simultaneous fit of QCD and BSM parameters with xFitter
The European physical journal / C 84(11), 1235 (2024) [10.1140/epjc/s10052-024-13585-w]2024     Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---