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.

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

References in corpus (6)

• Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production
• Measurement of the single-top-quark t-channel cross section in pp collisions at sqrt(s) = 7 TeV
• t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
• Collider Signals of Top Quark Flavor Violation from a Warped Extra Dimension
• Constraints on the Wtb vertex from early LHC data
• Interplay of t --> b W Decay and B_q Meson Mixing in Minimal Flavor Violating Models

Cited by in corpus (2)

• Constraining New Physics with Single Top production at LHC
• SMEFT chromomagnetic dipole operator contributions to $t\bar{t}$ production at approximate NNLO in QCD