Next-to-leading order QCD corrections to $t\bar{t}\gamma$ production at the 7 TeV LHC

Abstract

We present the theoretical predictions including the complete next-to-leading order (NLO) QCD corrections to the top-quark pair production in association with a photon at the LHC with center-of-mass system energy of $7\mathrm{TeV}$. The uncertainties of the leading order (LO) and NLO QCD corrected cross sections due to the renormalization/factorization scale, and the distributions of the transverse momenta of final top-quark and photon are studied. Moreover, we provide the numerical results of the LO, NLO QCD corrected cross sections and the corresponding $K$-factors with different photon transverse momentum cuts. We also discuss the impact of QCD corrections to the \ppttga in case of there existing the exotic top-quark with an electric charge of $-4e/3$ at the $7\mathrm{TeV}$ LHC.

4 pages, 3 figures

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Cited by in corpus (8)

• 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
• Off-shell vs on-shell modelling of top quarks in photon associated production
• Electroweak corrections to top quark pair production in association with a hard photon at hadron colliders
• Complete NLO corrections to top-quark pair production with isolated photons
• Higher-order corrections in $t\bar{t}\gamma$ cross sections
• 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
• NLO QCD predictions for $\mathbf{t}\bar{\mathbf{t}}\mathbf{\gamma }$ with realistic photon isolation