20-27 July 2011
Alpes Congrès - Alpexpo
Europe/Paris timezone

Top-quark pair plus photon production at NLO QCD and the top quark electric charge

21 Jul 2011, 12:00
Stendhal (Alpes Congrès - Alpexpo)


Alpes Congrès - Alpexpo

Parallel session talk Top and Electroweak Physics Top and Electroweak Physics


Dr Andreas Scharf (SUNY Buffalo)


I want to discuss the next-to-leading order QCD corrections to the production of a top-quark pair in association with a hard photon. This process allows a direct measurement of the top quark electromagnetic couplings. For a realistic description of this process we incorporated top quark and W-boson decays using the narrow width approximation. Photon radiation off top quark decay products is included and yields a significant contribution to the cross section. I will present our findings for ttbar+gamma production at the Tevatron using the selection criteria of a recent CDF analysis. For the LHC I will discuss the impact of the QCD corrections to the ttbar+gamma process on the measurement of the top quark electric charge.

Primary authors

Dr Andreas Scharf (SUNY Buffalo) Prof. Kirill Melnikov (Johns Hopkins University) Dr Markus Schulze (Johns Hopkins University)

Presentation Materials