Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC

The SMEFiT collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

2 Downloads (Pure)

Abstract

We present a global interpretation of Higgs, diboson, and top quark production and decay measurements from the LHC in the framework of the Standard Model Effective Field Theory (SMEFT) at dimension six. We constrain simultaneously 36 independent directions in its parameter space, and compare the outcome of the global analysis with that from individual and two-parameter fits. Our results are obtained by means of state-of-the-art theoretical calculations for the SM and the EFT cross-sections, and account for both linear and quadratic corrections in the 1/Λ2 expansion. We demonstrate how the inclusion of NLO QCD and O(Λ−4) effects is instrumental to accurately map the posterior distributions associated to the fitted Wilson coefficients. We assess the interplay and complementarity between the top quark, Higgs, and diboson measurements, deploy a variety of statistical estimators to quantify the impact of each dataset in the parameter space, and carry out fits in BSM-inspired scenarios such as the top-philic model. Our results represent a stepping stone in the ongoing program of model-independent searches at the LHC from precision measurements, and pave the way towards yet more global SMEFT interpretations extended to other high-pT processes as well as to low-energy observables. [Figure not available: see fulltext.]

Original languageEnglish
Article number89
Pages (from-to)1-97
Number of pages97
JournalJournal of High Energy Physics
Volume2021
Issue number11
Early online date12 Nov 2021
DOIs
Publication statusPublished - Nov 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

Funding

FundersFunder number
Horizon 2020 Framework Programme788223, 752748, 722104

    Keywords

    • Beyond Standard Model
    • Effective Field Theories
    • Higgs Physics

    Fingerprint

    Dive into the research topics of 'Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC'. Together they form a unique fingerprint.

    Cite this