Complete SMEFT predictions for four top quark production at hadron colliders

Abstract

We study four top quark production at hadron colliders in the Standard Model Effective Field Theory (SMEFT). We perform an analysis at the tree-level, including all possible QCD- and EW-coupling orders and relevant dimension-six operators. We find several cases where formally subleading terms give rise to significant contributions, potentially providing sensitivity to a broad class of operators. Inclusive and differential predictions are presented for the LHC and a future $pp$ circular collider operating at $100$ TeV. We estimate the sensitivity of different operators and perform a simplified chi-square fit to set limits on SMEFT Wilson coefficients. In so doing, we assess the importance of including subleading terms and differential information in constraining new physics contributions. Finally, we compute the SMEFT predictions for the double insertion of dimension-six operators and scrutinise the possible enhancements to the sensitivity induced by a specific class of higher order terms in the EFT series.

32 pages with tables and figures, v2: version accepted by JHEP

References in corpus (9)

• 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
• Top Compositeness at the Tevatron and LHC
• Constraining BSM Physics at the LHC: Four top final states with NLO accuracy in perturbative QCD
• Manifestations of Top Compositeness at Colliders
• LHC multijet events as a probe for anomalous dimension-six gluon interactions
• Probing top-philic sgluons with LHC Run I data
• Multi-tops at the LHC
• Probing Top-philic New Physics via Four-Top-Quark Production

Cited by in corpus (13)

• The Standard Model effective field theory at work
• Observation of four-top-quark production in the multilepton final state with the ATLAS detector
• The top quark legacy of the LHC Run II for PDF and SMEFT analyses
• Resolving the Flavor Structure in the MFV-SMEFT
• Dispelling the $\sqrt{L}$ myth for the High-Luminosity LHC
• On the BSM reach of four top production at the LHC
• Four top final states with NLO accuracy in perturbative QCD: 4 lepton channel
• Collider-Flavour Complementarity from the bottom to the top
• The Art of Counting: a reappraisal of the HEFT expansion
• Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel
• Top-philic Machine Learning
• Staying on Top of SMEFT-Likelihood Analyses
• Probing effective operators in single top quark production in association with a lepton-neutrino pair