Higher-order corrections in $t\bar{t}\gamma$ cross sections

Abstract

We study higher-order QCD corrections for the associated production of a top-antitop quark pair and a photon ($t\bar{t}\gamma$ production) in proton-proton collisions. We calculate the approximate NNLO cross section, with second-order soft-gluon corrections added to the complete NLO result, including uncertainties from scale dependence and from parton distributions. We compare our results to recent measurements from the LHC, and find that the soft-gluon corrections provide improved agreement with the data. We also calculate differential distributions in top-quark transverse momentum and rapidity.

arXiv comment10 pages, 4 figures, 1 table

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Cited by in corpus (8)

• Complete NLO corrections to top-quark pair production with isolated photons
• Linear power corrections to top quark pair production in hadron collisions
• Soft-gluon corrections in $t\bar{t}W$ production
• SMEFT chromomagnetic dipole operator contributions to $t\bar{t}$ production at approximate NNLO in QCD
• NLO QCD predictions for $\mathbf{t}\bar{\mathbf{t}}\mathbf{\gamma }$ with realistic photon isolation
• Resummation for $s$-channel single-top production
• Higher-order QCD and electroweak corrections for $t\bar{t}H$ production
• One-loop amplitudes for $t\bar{t}j$ and $t\bar{t}\gamma$ productions at the LHC through $\mathcal{O}({\epsilon }^2)$