Dipole-induced anomalous top quark couplings at the LHC

Abstract

We consider direct bounds on the coefficients of higher dimensional top quark dipole operators from their contributions to anomalous top couplings that affect some related processes at the LHC. Several observables are studied. In particular, we incorporate for the first time in this type of analysis the recently measured associated $t\bar{t}V$ production, which is currently the only measured direct observable sensitive to the dipole operator involving the hypercharge field. We perform a Bayesian analysis to derive the $1(2)\sigma$ confidence level (CL) intervals on these coefficients.

arXiv comment9 pages, 1 figure, 1 table; references added. Version accepted for publication in PRD

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Cited by in corpus (8)

• Measurement of the cross section for top quark pair production in association with a W or Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Pinning down electroweak dipole operators of the top quark
• Dimension-six electroweak top-loop effects in Higgs production and decay
• Observation of top quark pairs produced in association with a vector boson in pp collisions at sqrt(s) = 8 TeV
• Probing top quark neutral couplings in the Standard Model Effective Field Theory at NLO QCD
• New physics and signal-background interference in associated $pp\to HZ$ production
• Constraining New Physics with Single Top production at LHC
• SMEFT chromomagnetic dipole operator contributions to $t\bar{t}$ production at approximate NNLO in QCD