Electroweak Loops as a Probe of New Physics in $t\bar{t}$ Production at the LHC

Abstract

We calculate the $\mathcal{O}(\alpha )$ weak corrections to top quark pair production at the LHC and include anomalous electroweak interactions from dimension-six operators. The loop calculation and renormalization are consistently done within the Standard Model Effective Field Theory. Sensitivity to the involved operators is exposed through the virtual corrections, which receive enhancement from electroweak Sudakov logarithms. We investigate the prospects of using this feature for probing New Physics at the LHC that so far has only been studied in final states with on-shell sensitivity such as $t\bar{t}+Z$ or $t\to bW$. We find that the large $t\bar{t}$ production rate and the excellent perturbative control allow compensating the loop suppression and yield remarkably strong constraints that are competitive with those from $t\bar{t}+Z$.

arXiv comment13 pages, 8 figures, revised version, matches published version

References in corpus (53)

• Parton distributions for the LHC Run II
• Dimension-Six Terms in the Standard Model Lagrangian
• Search for the Standard Model Higgs Boson at LEP
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
• Hadronic top-quark pair production with NNLL threshold resummation
• High-precision differential predictions for top-quark pairs at the LHC
• Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order
• 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
• Top-pair production at the LHC through NNLO QCD and NLO EW
• O new physics, where art thou? A global search in the top sector
• On the NNLO QCD corrections to single-top production at the LHC
• Sudakov Effects in Electroweak Corrections
• NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders
• Threshold Resummation for Top-Pair Hadroproduction to Next-to-Next-to-Leading Log
• An NLO+PS generator for $t\bar{t}$ and $Wt$ production and decay including non-resonant and interference effects
• Electroweak effects in top-quark pair production at Hadron Colliders
• Feynman Rules for the Standard Model Effective Field Theory in $R_{\xi }$-gauges
• NNLO QCD predictions for fully-differential top-quark pair production at the Tevatron
• Weak interaction corrections to hadronic top quark pair production
• Electroweak corrections to top-quark pair production in quark--antiquark annihilation
• $O({\alpha }_s^2)$ corrections to fully-differential top quark decays
• Second Order QCD Corrections to $\Gamma (t\to Wb)$
• NNLO QCD Corrections to t-channel Single Top-Quark Production and Decay
• Weak Boson Emission in Hadron Collider Processes
• Effective Field Theories
• Weak Interactions in Top-Quark Pair Production at Hadron Colliders: An Update
• NLO electroweak corrections to off-shell top-antitop production with leptonic decays at the LHC
• Mixed QCD and weak corrections to top quark pair production at hadron colliders
• Two-loop QCD corrections to top quark width
• Higher order corrections to spin correlations in top quark pair production at the LHC
• NLO QCD corrections to W+ W- b anti-b production with leptonic decays in the light of top quark mass and asymmetry measurements
• Effective Field Theory Beyond the Standard Model
• Probing top-Z dipole moments at the LHC and ILC
• Weak corrections to gluon-induced top-antitop hadro-production
• Pinning down electroweak dipole operators of the top quark
• Electroweak and finite width corrections to top quark decays into transverse and longitudinal $W$-bosons
• NLO QED contributions to top-pair production at hadron collider
• The impact of the photon PDF and electroweak corrections on $t\bar{t}$ distributions
• Off-shell single-top production at NLO matched to parton showers
• Constraining couplings of the top quarks to the Z boson in ttbar+Z production at the LHC
• Resummation for (boosted) top-quark pair production at NNLO+NNLL' in QCD
• Weak interaction corrections to hadronic top quark pair production: contributions from quark-gluon and $b\bar{b}$ induced reactions
• Differential Distributions for t-channel Single Top-Quark Production and Decay at Next-to-Next-to-Leading Order in QCD
• Soft-gluon resummation for boosted top-quark production at hadron colliders
• New Insights into the Perturbative Structure of Electroweak Sudakov Logarithms
• Boosted top production: factorization and resummation for single-particle inclusive distributions
• Study of weak corrections to Drell-Yan, top-quark pair and dijet Production at high energies with MCFM
• Techniques for the treatment of IR divergences in decay processes at NLO and application to the top-quark decay
• Top-quark pair-production and decay at high precision
• NNLO QCD corrections to the polarized top quark decay $t(\uparrow )\to X_b+W^{+}$

Cited by in corpus (5)

• Automated one-loop computations in the SMEFT
• Probing the CP structure of the top quark Yukawa coupling: Loop sensitivity vs. on-shell sensitivity
• Probing $Zt\bar{t}$ couplings using $Z$ boson polarization in $ZZ$ production at hadron colliders
• Constraining New Physics with Single Top production at LHC
• State-of-the-art cross sections for ttH: NNLO predictions matched with NNLL resummation and EW corrections