Journal Article

PUBDB-2024-05383

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* ; Amoroso, S.DESY* ; Gao, J. ; Lipka, K.DESY* ; Zenaiev, O.Extern*

2024
Springer Heidelberg

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Please use a persistent id in citations: doi:10.1140/epjc/s10052-024-13585-w  doi:10.3204/PUBDB-2024-05383

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 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.

Note: 31 pages, 10 figures

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Contributing Institute(s):

1. LHC/CMS Experiment (CMS)

Research Program(s):

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

Experiment(s):

1. LHC: CMS

Appears in the scientific report 2024

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Database coverage:
; ; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Shen, X. (Corresponding author)Extern*DESY* ; Amoroso, S.DESY* ; Gao, J. ; Lipka, K.DESY* ; Zenaiev, O.Extern*
A framework for simultaneous fit of QCD and BSM parameters with xFitter
[10.3204/PUBDB-2024-08013]     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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