QCD corrections to top quark pair production in association with a photon at hadron colliders
By K. Melnikov, A. Scharf, M. Schulze. 2011
155 citations recorded by the source corpus.
We compute QCD corrections to the production of a $t\overline{t}$ pair in association with a hard photon at the Tevatron and the LHC. This process allows a direct measurement of the top quark electromagnetic couplings that, at the moment, are only loosely constrained. We include top quark decays, treating them in the narrow width approximation, and retain spin correlations of final-state particles. Photon radiation off top quark decay products is included in our calculation and yields a significant contribution to the cross section. We study next-to-leading-order QCD corrections to the $p\overline{p}\ensuremath{\rightarrow}t\overline{t}\ensuremath{\gamma}$ process at the Tevatron for the selection criteria used in a recent measurement by the CDF collaboration. We also discuss the impact of QCD corrections to the $pp\ensuremath{\rightarrow}t\overline{t}\ensuremath{\gamma}$ process on the measurement of the top quark electric charge at the 14 TeV LHC.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/e90e0f68645daf06ec2a1af1f1373123cca59b36
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In Nuclear and High Energy Physics
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Citations in the corpus
- Measurement of the differential cross section for top quark pair production in pp collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin} (2015, methodology): “The predicted cross section for the tt +γ sample is obtained by scaling the LO cross section obtained with the WHIZARD event generator [29] by an NLO/LO correction K-factor [30].”
- The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, unknown): “Results are available in the literature for Wbb̄ [68, 313–316], Zbb̄ [68, 315, 317], tt̄γ [318], tt̄Z [68,319–322], tt̄W [68,322,323] production.”