REVIEW 5 cited by
New Physics in the Third Generation: A Comprehensive SMEFT Analysis and Future Prospects
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
abstract
We present a comprehensive analysis of electroweak, flavor, and collider bounds on the complete set of dimension-six SMEFT operators in the $U(2)^5$-symmetric limit. This operator basis provides a consistent framework to describe a wide class of new physics models and, in particular, the motivated class of models where the new degrees of freedom couple mostly to the third generation. By analyzing observables from all three sectors, and consistently including renormalization group evolution, we provide bounds on the effective scale of all 124 $U(2)^5$-invariant operators. The relation between flavor-conserving and flavor-violating observables is analyzed taking into account the leading $U(2)^5$ breaking in the Yukawa sector, which is responsible for heavy-light quark mixing. We show that under simple, motivated, and non-tuned hypotheses for the parametric size of the Wilson coefficients at the high scale, all present bounds are consistent with an effective scale as low as 1.5 TeV. We also show that a future circular $e^+ e^-$ collider program such as FCC-ee would push most of these bounds by an order of magnitude. This would rule out or provide clear evidence for a wide class of compelling new physics models that are fully compatible with present data.
Forward citations
Cited by 5 Pith papers
-
Deconstructed Weak Isospin from a Symplectic Symmetry
An Sp(6) completion of deconstructed weak isospin predicts six new flavour-changing gauge bosons and pushes the intermediate SU(2)^3 breaking scale above ~550 TeV (or ~150 TeV at large scale separation) via K/D mixing...
-
Could electron-top interactions spoil the measurement of the Higgs trilinear? -A quantitative estimate at future lepton colliders-
Electron-top four-fermion operators are constrained by FCC-ee fermion-pair measurements strongly enough that they do not spoil the ~17% one-sigma extraction of the Higgs trilinear coupling.
-
First bounds on effective muon interactions using the NA64$\mu$ experiment at CERN
NA64mu data yield first 90% CL bounds on two SMEFT and three nuSMEFT four-lepton operators involving muons, with future projections to Lambda ~ 100 GeV.
-
Constraints on lepton-flavor mixing with third-generation new physics
The U(2)_ℓ-breaking spurion δ is constrained to |δ| < 0.051 (95% CL) by R_K(*) and B_s→μμ data, with derived upper limits for LFV τ and B decays.
-
Cornering Natural SUSY at a Tera-$Z$ Factory
FCC-ee's Tera-Z electroweak precision program could probe natural supersymmetric particles up to multi-TeV masses, sometimes better than Higgs coupling measurements, assuming Standard Model theory uncertainties can be...
Discussion (0). Continue with ORCID to comment.