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

Details Next-to-leading order QCD corrections to $t\bar tγ$ production at the 7 TeV LHC Next-to-leading order QCD corrections to $t\bar tγ$ production at the 7 TeV LHC

2011-10-11

arxiv.org/abs/1110.2315v2

Chin. Phys. Lett. Vol. 28, No. 11 (2011) 111401

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

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 $7 {\rm TeV}$. 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 $7 {\rm TeV}$ LHC.

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