A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector

Abstract

We present a novel framework for carrying out global analyses of the Standard Model Effective Field Theory (SMEFT) at dimension-six: SMEFiT. This approach is based on the Monte Carlo replica method for deriving a faithful estimate of the experimental and theoretical uncertainties and enables one to construct the probability distribution in the space of the SMEFT degrees of freedom. As a proof of concept of the SMEFiT methodology, we present a first study of the constraints on the SMEFT provided by top quark production measurements from the LHC. Our analysis includes more than 30 independent measurements from 10 different processes at 8 and 13 TeV such as inclusive top-quark pair and single-top production and the associated production of top quarks with weak vector bosons and the Higgs boson. State-of-the-art theoretical calculations are adopted both for the Standard Model and for the SMEFT contributions, where in the latter case NLO QCD corrections are included for the majority of processes. We derive bounds for the 34 degrees of freedom relevant for the interpretation of the LHC top quark data and compare these bounds with previously reported constraints. Our study illustrates the significant potential of LHC precision measurements to constrain physics beyond the Standard Model in a model-independent way, and paves the way towards a global analysis of the SMEFT.

76 pages, 24 figures, version accepted for publication in JHEP

References in corpus (18)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Event generation with SHERPA 1.1
• Single-top hadroproduction in association with a W boson
• A first unbiased global determination of polarized PDFs and their uncertainties
• Complete Higgs Sector Constraints on Dimension-6 Operators
• Compilation of low-energy constraints on 4-fermion operators in the SMEFT
• A determination of the fragmentation functions of pions, kaons, and protons with faithful uncertainties
• Model-independent precision constraints on dimension-6 operators
• Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
• Effective four-fermion operators in top physics: a roadmap
• Precision determination of electroweak parameters and the strange content of the proton from neutrino deep-inelastic scattering
• tWH associated production at the LHC
• Anomalous Triple Gauge Couplings in the Effective Field Theory Approach at the LHC
• Higgs production in association with a top-antitop pair in the Standard Model Effective Field Theory at NLO in QCD
• Novel measurements of anomalous triple gauge couplings for the LHC
• Disguising the Oblique Parameters
• Precision Probes of QCD at High Energies
• The impact of the LHC Z-boson transverse momentum data on PDF determinations

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