Putting SMEFT Fits to Work

  title={Putting SMEFT Fits to Work},
  author={Sally Dawson and Samuel Homiller and Samuel D. Lane},
  journal={Physical Review D},
The Standard Model Effective Field Theory (SMEFT) provides a consistent framework for comparing precision measurements at the LHC to the Standard Model. The observation of statistically significant non-zero SMEFT coefficients would correspond to physics beyond the Standard Model (BSM) of some sort. A more difficult question to answer is what, if any, detailed information about the nature of the underlying high scale model can be obtained from these measurements. In this work, we consider the… 
Uncovering the high-scale Higgs singlet model
The scalar singlet model extends the Standard Model with the addition of a new gauge singlet scalar. We re-examine the limits on the new scalar from oblique parameter fits and from a global fit to
The top quark electro-weak couplings after LHC Run 2
Abstract Recent measurements at the Large Hadron Collider allow for a robust and precise characterisation of the electro-weak interactions of the top quark. We present the results of a global
Cornering the Two Higgs Doublet Model Type II
Abstract We perform a comprehensive study of the allowed parameter space of the Two Higgs Doublet Model of Type II (2HDM-II). Using the theoretical framework flavio we combine the most recent
The Higgs boson implications and prospects for future discoveries
The Higgs boson, a fundamental scalar, was discovered at CERN in 2012 with mass 125 GeV, a mass that turned out to be a remarkable choice of Nature. In the Standard Model of particle physics, the
EFT diagrammatica: UV roots of the CP-conserving SMEFT
The Standard Model Effective Field Theory (SMEFT) is an established theoretical framework that parametrises the impact a UV theory has on low-energy observables. Such parametrization is achieved by
SMEFT analysis of vector boson scattering and diboson data from the LHC Run II
We present a systematic interpretation of vector boson scattering (VBS) and diboson measurements from the LHC in the framework of the dimension-six Standard Model Effective Field Theory (SMEFT). We
SMEFTsim 3.0 — a practical guide
The description of Higgs production via gluon-fusion in the SM has been significantly improved, two flavor assumptions for studies in the top quark sector have been added, and a new feature has been implemented, that enables the treatment of linearized SMEFT corrections to the propagators of unstable particles.
Electroweak restoration at the LHC and beyond: The Vh channel
Electroweak symmetry breaking is a key feature of the Standard Model, and at high energies we should see ``restoration'' of the full symmetry. In this paper, the authors show how the
Standard model EFT effects in vector-boson scattering at the LHC
The assumption that the Standard Model is an Effective Field Theory (SM EFT) of a more fundamental theory at a higher, than electroweak, energy scale, implies a growth of cross-sections for
Connecting electroweak-scale observables to BSM physics through EFT and Bayesian statistics
The effects of 11 single scalar-multiplet extensions of the SM are inspected on the combined set of electroweak precision observables and Higgs signal strength data by systematically integrating out the heavy multiplets and computing the resulting Standard Model effective field theory operators and Wilson coefficients up to one-loop level.


The Gauge-Higgs legacy of the LHC run II
We present a global analysis of the Higgs and electroweak sector based on LHC Run II and electroweak precision observables. We show which measurements provide the leading constraints on Higgs-related
Review of combined measurements of Higgs boson production and decay using up to 80 fb−1 of proton–proton collision data at s = 13 TeV collected with the ATLAS experiment
The combined measurements of Higgs boson production and decay are performed based on up to 80 fb[Formula: see text] of proton–proton collision data collected at [Formula: see text] = 13 TeV by the
Bounds and decays of new heavy vector-like top partners
We study the phenomenology of new heavy vector-like fermions that couple to the third generation quarks via Yukawa interactions, covering all the allowed representations under the standard model
Validity of SMEFT studies of VH and VV Production at NLO
  • arXiv:2003.07862 [hep-ph].
  • 2003
Vectorlike fermions and Higgs effective field theory revisited
Heavy vector-like quarks (VLQs) appear in many models of beyond the Standard Model physics. Direct experimental searches require these new quarks to be heavy, $\gsim$ 800-1000 GeV. We perform a
Effective description of general extensions of the Standard Model: the complete tree-level dictionary
A bstractWe compute all the tree-level contributions to the Wilson coefficients of the dimension-six Standard-Model effective theory in ultraviolet completions with general scalar, spinor and vector
Pushing Higgs Effective Theory to its Limits
At the LHC, an effective theory of the Higgs sector allows us to analyze kinematic distributions in addition to inclusive rates, although there is no clear hierarchy of scales. We systematically
Benchmarks for Higgs effective theory: extended Higgs sectors
A bstractPrecise measurements of SM particles properties at the LHC allows to look for heavy New Physics in the context of an Effective Field Theory (EFT). These searches, however, often rely on
How to use the Standard Model effective field theory
A bstractWe present a practical three-step procedure of using the Standard Model effective field theory (SM EFT) to connect ultraviolet (UV) models of new physics with weak scale precision
A Higgs conundrum with vector fermions
Many models of Beyond the Standard Model physics involve heavy colored fermions. We study models where the new fermions have vector interactions and examine the connection between electroweak