Resolving the Flavor Structure in the MFV-SMEFT

Abstract

We constrain the flavor structure of Wilson coefficients in the Standard Model Effective Field Theory (SMEFT) from data. In the SMEFT, new physics effects in couplings of up-type and down-type quarks are related through the Cabibbo-Kobayashi-Maskawa mixing matrix. We exploit this relation to pin down potential new sources of flavor symmetry breaking in a global analysis of high- and low-energy data from the LHC, LEP, and $b$ factory experiments. We demonstrate the power of such an analysis by performing a combined fit of effective four-quark and two-quark couplings contributing to a large set of flavor, top-quark, electroweak, and dijet observables. All four sectors are needed to fully resolve the flavor structure of the four-quark couplings without leaving blind directions in the parameter space. Although we work in the framework of minimal flavor violation, our strategy applies as well to other flavor patterns, like $U(2)$ flavor symmetry or leptoquark scenarios.

32 pages, 7 figures, 4 tables

References in corpus (11)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector
• Model-independent precision constraints on dimension-6 operators
• Measuring the Higgs Sector
• DsixTools 2.0: The Effective Field Theory Toolkit
• Measuring Supersymmetry
• Effective Theory Approach to New Physics with Flavour: General Framework and a Leptoquark Example
• Probing anomalous $t\bar{t}Z$ interactions with rare meson decays
• Complete SMEFT predictions for four top quark production at hadron colliders
• Building blocks of the flavourful SMEFT RG
• Flavorful Electroweak Precision Observables in the Standard Model Effective Field Theory

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• Constraining new physics effective interactions via a global fit of electroweak, Drell-Yan, Higgs, top, and flavour observables
• Collider-Flavour Complementarity from the bottom to the top
• Froggatt-Nielsen Meets the SMEFT
• Multi-Component Dark Matter from Minimal Flavor Violation
• Staying on Top of SMEFT-Likelihood Analyses
• Probing Z/W Pole Physics at High-energy Muon Colliders via Vector-boson-fusion Processes
• Tracing the bottom electroweak dipole operators at future lepton colliders