Complete NLO corrections to top-quark pair production with isolated photons

Abstract

We compute for the first time the so-called complete NLO corrections to top-quark pair production with one and two isolated photons in the di-lepton top-quark decay channel. The Narrow Width Approximation is used for the modeling of unstable top quarks and $W$ bosons. Higher-order QCD and EW effects as well as photon bremsstrahlung are consistently included at all stages: in production and top-quark decays. We present results at the integrated and differential fiducial cross-section level for both processes for the LHC Run II center-of-mass energy of $\sqrt{s}=13$ TeV. In addition, we investigate the scale choice in photonic observables. Finally, the individual size of each subleading contribution is discussed in detail and the origin of the main subleading corrections is scrutinised. For the latter case, alternative calculations are performed in which the subleading NLO corrections are included only in the production of $t\bar{t}\gamma$ and $t\bar{t}\gamma \gamma$.

arXiv comment34 pages, 13 Figures, 2 Tables, version to appear in JHEP

References in corpus (87)

• 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
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Matching NLO QCD computations and parton shower simulations
• 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
• Reduction schemes for one-loop tensor integrals
• Matching NLO QCD and parton showers in heavy flavour production
• 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
• A standard format for Les Houches Event Files
• Electroweak corrections to charged-current e+e- --> 4 fermion processes - technical details and further results
• Isolated photons in perturbative QCD
• Predictions for all processes e^+e^- -> 4 fermions + gamma
• OneLOop: for the evaluation of one-loop scalar functions
• How bright is the proton? A precise determination of the photon parton distribution function
• Reduction of one-loop tensor 5-point integrals
• Application of the Background-Field Method to the electroweak Standard Model
• Assault on the NLO Wishlist: pp -> tt bb
• Single top production and decay at next-to-leading order
• Scalar one-loop 4-point integrals
• RECOLA: REcursive Computation of One-Loop Amplitudes
• Recola2: REcursive Computation of One-Loop Amplitudes 2
• The Photon Content of the Proton
• The complex-mass scheme for perturbative calculations with unstable particles
• Illuminating the photon content of the proton within a global PDF analysis
• 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
• Top-pair production and decay at NLO matched with parton showers
• Large NLO corrections in $t\bar{t}{W}^{\pm }$ and $t\bar{t}t\bar{t}$ hadroproduction from supposedly subleading EW contributions
• Parton showers with quantum interference
• 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
• On-the-fly reduction of open loops
• An NLO+PS generator for $t\bar{t}$ and $Wt$ production and decay including non-resonant and interference effects
• NLO QCD corrections to tri-boson production
• Probing Electroweak Top Quark Couplings at Hadron Colliders
• 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
• Top quark pair production in association with a jet: QCD corrections and jet radiation in top quark decays
• On the computation of multigluon amplitudes
• NLO electroweak corrections to off-shell top-antitop production with leptonic decays at the LHC
• Explaining the t-tbar asymmetry with a light axigluon
• 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
• Probing top-Z dipole moments at the LHC and ILC
• Pinning down electroweak dipole operators of the top quark
• Off-shell Top Quarks with One Jet at the LHC: A comprehensive analysis at NLO QCD
• NLO QCD and electroweak corrections to $Z+\gamma$ production with leptonic Z-boson decays
• Shaping the top asymmetry
• Stealth gluons at hadron colliders
• Complete Nagy-Soper subtraction for next-to-leading order calculations in QCD
• Matching the Nagy-Soper parton shower at next-to-leading order
• Multi-gluon one-loop amplitudes using tensor integrals
• NLO electroweak corrections in extended Higgs Sectors with RECOLA2
• Phenomenology of a light gluon resonance in top-physics at Tevatron and LHC
• Direct Measurement of the Top Quark Charge at Hadron Colliders
• Electromagnetic dipole moments of the top quark
• NLO QCD and electroweak corrections to W+γ production with leptonic W-boson decays
• Techniques for the treatment of IR divergences in decay processes at NLO and application to the top-quark decay
• Hard Photons in Hadroproduction of Top Quarks with Realistic Final States
• Automated EW corrections with isolated photons: $t\bar{t}\gamma$, $t\bar{t}\gamma \gamma$ and $t\gamma j$ as case studies
• Shedding light on the $t\bar{t}$ asymmetry: the photon handle
• Towards constraining Dark Matter at the LHC: Higher order QCD predictions for $t\bar{t}+Z(Z\to {\nu }_{\ell }{\bar{\nu }}_{\ell })$
• 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
• Leptonic Monotops at LHC
• Electroweak corrections to top quark pair production in association with a hard photon at hadron colliders
• Next-to-leading order QCD corrections to $t\bar{t}\gamma$ production at the 7 TeV LHC
• A study of additional jet activity in top quark pair production and decay at the LHC
• The top quark charge asymmetry in $t\bar{t}\gamma$ production at the LHC
• Associated production of a top-quark pair with two isolated photons at the LHC through NLO in QCD
• Spin Polarisation of $t\bar{t}\gamma \gamma$ production at NLO+PS with GoSam interfaced to MadGraph5_aMC@NLO
• Higher-order corrections in $t\bar{t}\gamma$ cross sections
• Hadroproduction of t anti-t pair with two isolated photons with PowHel
• Single lepton charge asymmetries in $t\bar{t}$ and $t\bar{t}\gamma$ production at the LHC

Cited by in corpus (9)

• Tri-boson and WH production in the ${\mathrm{W}}^{+}{\mathrm{W}}^{+}\mathrm{jj}$ channel: predictions at full NLO accuracy and beyond
• 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
• The $q_{\mathrm{T}}$ and $\Delta {\varphi }_{t\bar{t}}$ spectra in top-antitop hadroproduction at NNLL+NNLO: the interplay of soft-collinear resummation and Coulomb singularities
• Complete NLO corrections to off-shell $\mathbf{t}\bar{\mathbf{t}}$ production in the $\mathbf{\ell }+\mathbf{j}$ decay channel
• Complete NLO corrections to $t\bar{t}\gamma$ and $t\bar{t}\gamma \gamma$
• One-loop amplitudes for $t\bar{t}j$ and $t\bar{t}\gamma$ productions at the LHC through $\mathcal{O}({\epsilon }^2)$
• 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