Automated EW corrections with isolated photons: $t\bar{t}\gamma$, $t\bar{t}\gamma \gamma$ and $t\gamma j$ as case studies

Abstract

In this work we compute for the first time the so-called Complete-NLO predictions for top-quark pair hadroproduction in association with at least one isolated photon ($t\bar{t}\gamma$). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons ($t\bar{t}\gamma \gamma$) and for single-top hadroproduction in association with at least one isolated photon. In addition, we complement our results with NLO QCD+EW predictions of the hadronic and leptonic decays of top-quark including an isolated photon. All these results have been obtained in a completely automated approach, by extending the capabilities of the MadGraph5_aMC@NLO framework and enabling the Complete-NLO predictions for processes with isolated photons in the final state. We discuss the technical details of the implementation, which involves a mixed EW renormalisation scheme for such processes.

32 pages, 4 figures, 5 tables. This version matches the one published

References in corpus (23)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• Automation of next-to-leading order computations in QCD: the FKS subtraction
• Next-to-leading-order predictions for t-channel single-top production at hadron colliders
• A global approach to top-quark flavor-changing interactions
• Weak corrections to Higgs hadroproduction in association with a top-quark pair
• Automatic computations at next-to-leading order in QCD for top-quark flavor-changing neutral processes
• Observation of top-quark pair production in association with a photon and measurement of the $t\bar{t}\gamma$ production cross section in pp collisions at $\sqrt{s}=7$ TeV using the ATLAS detector
• Physics at a 100 TeV pp collider: Standard Model processes
• Top-quark pair production in association with a $W^{\pm }$ gauge boson in the POWHEG-BOX
• Measurement of the semileptonic tt-bar gamma production cross section in pp collisions at sqrt(s) = 8 TeV
• Measurement of the $t\bar{t}\gamma$ production cross section in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• RIP $Hb\bar{b}$: How other Higgs production modes conspire to kill a rare signal at the LHC
• Combined NLO EW and QCD corrections to off-shell $\text{t}\overline{\text{t}}\text{W}$ production at the LHC
• Measurements of inclusive and differential cross-sections of combined $t\bar{t}\gamma$ and $tW\gamma$ production in the $e\mu$ channel at 13 TeV with the ATLAS detector
• Electroweak corrections to top quark pair production in association with a hard photon at hadron colliders
• Prospects for quarkonium studies at the high-luminosity LHC
• The top quark charge asymmetry in $t\bar{t}\gamma$ production at the LHC
• Modeling of $t$-channel single top-quark production at the LHC
• Pseudoscalar pair production via off-shell Higgs in composite Higgs models

Cited by in corpus (23)

• Les Houches 2021: Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• One-loop electroweak Sudakov logarithms: a revisitation and automation
• Higher-order EW corrections in ZZ and ZZj production at the LHC
• Probing the Interactions of Axion-Like Particles with Electroweak Bosons and the Higgs Boson in the High Energy Regime at LHC
• Top-quark pair production as a probe of light top-philic scalars and anomalous Higgs interactions
• Complete NLO corrections to top-quark pair production with isolated photons
• Higher-order corrections in $t\bar{t}\gamma$ cross sections
• QCD corrections in $tq\gamma$ production at hadron colliders
• Associated production of a top-quark pair with two isolated photons at the LHC through NLO in QCD
• Measurement of the inclusive and differential $\mathrm{t}\bar{\mathrm{t}}\gamma$ cross sections in the dilepton channel and effective field theory interpretation in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector
• Dimuon and ditau production in photon-photon collisions at next-to-leading order in QED
• EW corrections and Heavy Boson Radiation at a high-energy muon collider
• Climbing to the Top of the ATLAS 13 TeV data
• NLO electroweak and QCD corrections to the production of a photon with three charged lepton plus missing energy at the LHC
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• Exploring Higgs-Photon Production at the LHC
• NLO QCD predictions for $\mathbf{t}\bar{\mathbf{t}}\mathbf{\gamma }$ with realistic photon isolation
• Automated next-to-leading order QCD and electroweak predictions of photon-photon processes in ultraperipheral collisions
• Photon radiation effects in kinematic reconstruction of top quarks
• One-loop amplitudes for $t\bar{t}j$ and $t\bar{t}\gamma$ productions at the LHC through $\mathcal{O}({\epsilon }^2)$
• NNLO QCD corrections to $\gamma \gamma \to Q\bar{Q}$ from Local Unitarity combined with Coulomb resummation and NLO EW effects
• Automated event generation for S-wave quarkonium and leptonium production in NRQCD and NRQED