Associated production of a top-quark pair with two isolated photons at the LHC through NLO in QCD

Abstract

We report on the computation of NLO QCD corrections to top-quark pair production in association with two photons at the LHC. Higher-order effects and photon bremsstrahlung are taken into account in the production and decays of the top-quark pair. Top-quark and $W$-boson decays are treated in the Narrow Width Approximation conserving spin correlations up to NLO in QCD. This is the first time that the complete set of NLO QCD corrections to the $pp\to t\bar{t}\gamma \gamma$ process including top-quark decays is calculated. We present results at the integrated and differential cross-section level in the di-lepton and lepton $+$ jet channel. In addition, we investigate the effect of photon bremsstrahlung in $t\bar{t}$ production and top-quark decays, as well as the mixed contribution. The latter contribution, in which two photons occur simultaneously in the production and decay of the $t\bar{t}$ pair, proved to be significant at both the integrated and differential cross-section level.

arXiv comment33 pages, 11 Figures, 5 Tables, a few typos corrected after proofreading, version to appear in JHEP

References in corpus (71)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• LHAPDF6: parton density access in the LHC precision era
• A General Algorithm for Calculating Jet Cross Sections in NLO QCD
• Parton distributions from high-precision collider data
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Reducing full one-loop amplitudes to scalar integrals at the integrand level
• The Dipole Formalism for Next-to-Leading Order QCD Calculations with Massive Partons
• Next-to-leading order calculation of three-jet observables in hadron-hadron collision
• CutTools: a program implementing the OPP reduction method to compute one-loop amplitudes
• Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
• Electroweak corrections to charged-current e+e- --> 4 fermion processes - technical details and further results
• A standard format for Les Houches Event Files
• Isolated photons in perturbative QCD
• Predictions for all processes e^+e^- -> 4 fermions + gamma
• OneLOop: for the evaluation of one-loop scalar functions
• Assault on the NLO Wishlist: pp -> tt bb
• Single top production and decay at next-to-leading order
• Helac-nlo
• RECOLA: REcursive Computation of One-Loop Amplitudes
• Electroweak radiative corrections to e+e- --> WW --> 4fermions in double-pole approximation -- the RACOONWW approach
• Automated one-loop calculations: a proof of concept
• Complete off-shell effects in top quark pair hadroproduction with leptonic decay at next-to-leading order
• The PDF4LHC21 combination of global PDF fits for the LHC Run III
• Electroweak Radiative Corrections for Collider Physics
• Recursive generation of one-loop amplitudes in the Standard Model
• Next-to-leading order calculation of four-jet observables in electron-positron annihilation
• Polarizing the Dipoles
• NLO QCD corrections to top quark pair production and decay at hadron colliders
• NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders
• Constraining anomalous Higgs boson couplings to the heavy flavor fermions using matrix element techniques
• Higgs characterisation at NLO in QCD: CP properties of the top-quark Yukawa interaction
• tWH associated production at the LHC
• QCD corrections to top quark pair production in association with a photon at hadron colliders
• Associated production of a top-quark pair with vector bosons at NLO in QCD: impact on $t\bar{t}H$ searches at the LHC
• Ntuples for NLO Events at Hadron Colliders
• NNLO QCD corrections to three-photon production at the LHC
• Top quark pair production in association with a jet: QCD corrections and jet radiation in top quark decays
• On the computation of multigluon amplitudes
• Logarithmic electroweak corrections to gauge-boson pair production at the LHC
• NLO electroweak corrections to off-shell top-antitop production with leptonic decays at the LHC
• Determing the CP Nature of a Neutral Higgs Boson at the LHC
• Higher order corrections to spin correlations in top quark pair production at the LHC
• FeynGame
• NLO QCD corrections to off-shell top-antitop production with leptonic decays in association with a Higgs boson at the LHC
• Multi-jet Production in Hadron Collisions
• Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis at NLO QCD
• Complete Nagy-Soper subtraction for next-to-leading order calculations in QCD
• Probing the Top-Higgs Yukawa CP Structure in dileptonic $t\bar{t}h$ with $M_2$-Assisted Reconstruction
• Differential decay rates of CP-even and CP-odd Higgs bosons to top and bottom quarks at NNLO QCD
• Matching the Nagy-Soper parton shower at next-to-leading order
• Pseudoscalar top-Higgs coupling: Exploration of $\mathrm{CP}$-odd observables to resolve the sign ambiguity
• Off-shell production of top-antitop pairs in the lepton+jets channel at NLO QCD
• Next-to-leading order QCD corrections to diphoton-plus-jet production through gluon fusion at the LHC
• Machine learning the Higgs boson-top quark CP phase
• Probing the CP nature of the Higgs coupling in $t\bar{t}h$ events at the LHC
• Driving Miss Data: Going up a gear to NNLO
• Hard Photons in Hadroproduction of Top Quarks with Realistic Final States
• Probing the CP structure of the top quark Yukawa coupling: Loop sensitivity vs. on-shell sensitivity
• Constraining CP-violation in the Higgs-top-quark interaction using machine-learning-based inference
• Automated EW corrections with isolated photons: $t\bar{t}\gamma$, $t\bar{t}\gamma \gamma$ and $t\gamma j$ as case studies
• Towards constraining Dark Matter at the LHC: Higher order QCD predictions for $t\bar{t}+Z(Z\to {\nu }_{\ell }{\bar{\nu }}_{\ell })$
• Scale and isolation sensitivity of diphoton distributions at the LHC
• Production and decay of the Higgs boson in association with top quarks
• Off-shell vs on-shell modelling of top quarks in photon associated production
• CP-violation, Asymmetries and Interferences in $t\bar{t}\varphi$
• Precise predictions for $t\bar{t}\gamma /t\bar{t}$ cross section ratios at the LHC
• The top quark charge asymmetry in $t\bar{t}\gamma$ production at the LHC
• Spin Polarisation of $t\bar{t}\gamma \gamma$ production at NLO+PS with GoSam interfaced to MadGraph5_aMC@NLO
• Hadroproduction of t anti-t pair with two isolated photons with PowHel
• $\mathcal{C}\mathcal{P}$ structure of the top-quark Yukawa interaction: NLO QCD corrections and off-shell effects

Cited by in corpus (9)

• Complete NLO corrections to top-quark pair production with isolated photons
• Four top final states with NLO accuracy in perturbative QCD: 4 lepton channel
• Les Houches 2023 -- Physics at TeV Colliders: Report on the Standard Model Precision Wishlist
• NLO QCD predictions for $\mathbf{t}\bar{\mathbf{t}}\mathbf{\gamma }$ with realistic photon isolation
• Four top final states with NLO accuracy in perturbative QCD: 3 lepton channel
• $t\bar{t}t\bar{t}$: NLO QCD corrections in production and decays for the $3\ell$ channel
• Complete NLO corrections to $t\bar{t}\gamma$ and $t\bar{t}\gamma \gamma$
• Inclusive and differential measurements of the $\mathrm{t}\bar{\mathrm{t}}\gamma$ cross section and the $\mathrm{t}\bar{\mathrm{t}}\gamma$ / $\mathrm{t}\bar{\mathrm{t}}$ cross section ratio in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Complete NLO corrections to off-shell $\mathbf{t}\bar{\mathbf{t}}$ production in the $\mathbf{\ell }+\mathbf{j}$ decay channel