English

Constraining new physics effective interactions via a global fit of electroweak, Drell-Yan, Higgs, top, and flavour observables

High Energy Physics - Phenomenology 2026-03-16 v2

Abstract

We present results from a global fit of Standard Model parameters and dimension-6 SMEFT Wilson coefficients that includes electroweak, Drell-Yan, Higgs-boson, top-quark, and flavour observables. Fits obtained by floating individual coefficients are also discussed. The leading-order scale dependence of the SMEFT Wilson coefficients is consistently included in the evolution from the UV scale to the electroweak scale and the low-energy scale of flavour observables. In defining the SMEFT set of active operators we consider both the U(3)5U(3)^5 and the U(2)5U(2)^5 flavour symmetric limits. All fits are obtained within the HEPfit\texttt{HEPfit} framework and are based on the most recent experimental results and state-of-the-art theoretical predictions for all the observables considered.

Keywords

Cite

@article{arxiv.2507.06191,
  title  = {Constraining new physics effective interactions via a global fit of electroweak, Drell-Yan, Higgs, top, and flavour observables},
  author = {J. de Blas and A. Goncalves and V. Miralles and L. Reina and L. Silvestrini and M. Valli},
  journal= {arXiv preprint arXiv:2507.06191},
  year   = {2026}
}

Comments

Version matches published article: 48 pages, 11 figures, 11 tables