一种用于同时拟合 QCD 与 BSM 参数的框架
摘要
presented of an extension of the xFitter open-source program for QCD analyses, 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.
关键词
引用
@article{arxiv.2407.16061,
title = {A framework for simultaneous fit of QCD and BSM parameters with xFitter},
author = {XiaoMin Shen and Simone Amoroso and Jun Gao and Katerina Lipka and Oleksandr Zenaiev},
journal= {arXiv preprint arXiv:2407.16061},
year = {2024}
}
备注
31 pages, 10 figures; published version