Correlating uncertainties in global analyses within SMEFT matters

Abstract

We investigate the impact of correlations between (theoretical and experimental) uncertainties on multi-experiment, multi-observable analyses within the Standard Model Effective Field Theory (SMEFT). To do so, we perform a model-independent analysis of $t$-channel single top-quark production and top-quark decay data from ATLAS, CMS, CDF and D0. We show quantitatively how the fit changes when different experimental or theoretical correlations are assumed. Scaling down statistical uncertainties according to the luminosities of future colliders with $300{\mathrm{fb}}^{-1}$ and higher, we find that this effect becomes a matter of life and death: assuming no correlations returns a fit in agreement with the Standard Model while a 'best guess'-ansatz taking into account correlations would observe new physics. At the same time, modelling the impact of higher order SMEFT-corrections the latter turn out to be a subleading source of uncertainty only.

arXiv comment17 pages, 6 figures, v2:Corrected a sign mistake in the code used to derive results of v1. Results are updated and numerical values included in two tables. Additional clarifications added. Conclusions unchanged

References in corpus (42)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• A Brief Introduction to PYTHIA 8.1
• Parton distributions for the LHC
• Dimension-Six Terms in the Standard Model Lagrangian
• New parton distributions for collider physics
• Parton distributions with QED corrections
• BAT - The Bayesian Analysis Toolkit
• A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector
• Top-Quark Decay at Next-to-Next-to-Leading Order in QCD
• O new physics, where art thou? A global search in the top sector
• Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV
• A global approach to top-quark flavor-changing interactions
• Helicity fractions of W bosons from top quark decays at NNLO in QCD
• Constraining top quark effective theory in the LHC Run II era
• Effective four-fermion operators in top physics: a roadmap
• Measurement of the t-channel single-top-quark production cross section and of the |Vtb| CKM matrix element in pp collisions at sqrt(s) = 8 TeV
• Measurement of the W boson polarization in top quark decays with the ATLAS detector
• A global fit of top quark effective theory to data
• Fiducial, total and differential cross-section measurements of $t$-channel single top-quark production in $pp$ collisions at 8 TeV using data collected by the ATLAS detector
• Single-top associated production with a $Z$ or $H$ boson at the LHC: the SMEFT interpretation
• Cross section measurement of t-channel single top quark production in pp collisions at sqrt(s) = 13 TeV
• The electro-weak couplings of the top and bottom quarks -- global fit and future prospects
• Measurement of the inclusive cross-sections of single top-quark and top-antiquark $t$-channel production in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Top-quark electroweak interactions at high energy
• EFTfitter---A tool for interpreting measurements in the context of effective field theories
• Measurement of the W boson helicity fractions in the decays of top quark pairs to lepton + jets final states produced in pp collisions at sqrt(s) = 8 TeV
• Measurement of the W boson helicity in top quark decays using 5.4 fb^-1 of ppbar collision data
• Measurement of the $W$ boson polarisation in $t\bar{t}$ events from $pp$ collisions at $\sqrt{s}$ = 8 TeV in the lepton+jets channel with ATLAS
• Measurement of the W-boson helicity in top-quark decays from ttbar production in lepton+jets events in pp collisions at sqrt(s) = 7 TeV
• Measurement of the W boson helicity in events with a single reconstructed top quark in pp collisions at sqrt(s) = 8 TeV
• Constraining top-quark couplings combining top-quark and $\mathbf{B}$ decay observables
• Probing top-quark couplings indirectly at Higgs factories
• Constraining four-fermion operators using rare top decays
• Measurement of W-Boson Polarization in Top-quark Decay in ppbar Collisions at sqrt(s) = 1.96 TeV
• Direct top-quark decay width measurement in the $t\bar{t}$ lepton+jets channel at $\sqrt{s}$=8 TeV with the ATLAS experiment
• Measurement of W-Boson Polarization in Top-quark Decay using the Full CDF Run II Data Set
• Learning to pinpoint effective operators at the LHC: a study of the $t\bar{t}b\bar{b}$ signature
• Off-shell single-top-quark production in the Standard Model Effective Field Theory
• Effective operators in $t$-channel single top production and decay
• Combinations of single-top-quark production cross-section measurements and $|f_{\mathrm{LV}}{V}_{tb}|$ determinations at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS experiments

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