A complete next-to-leading order QCD description of resonant $Z^{\prime }$ production and decay into $t\bar{t}$ final states

Abstract

We discuss QCD radiative corrections to the production of a heavy neutral resonance $Z^{\prime }$ at the LHC assuming that it decays into a $t\bar{t}$ final state. Compared to previous studies, our computation includes top quark decays as well as interference between the $Z^{\prime }$ signal process and the QCD $t\bar{t}$ background. The interference contribution appears for the first time at next-to-leading order (NLO) QCD and requires new one-loop amplitudes that are not present when signal and background are treated separately. We describe some examples of how QCD radiative corrections may influence both the exclusion limits and studies of properties of the new resonance, once it is discovered.

arXiv comment8 pages, 2 tables, 3 figures, version to be published in Phys.Rev.D

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Cited by in corpus (5)

• A search for $t\bar{t}$ resonances using lepton-plus-jets events in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Theory for Baryon Number and Dark Matter at the LHC
• A search for ttbar resonances in the lepton plus jets final state with ATLAS using 4.7 fb^-1 of pp collisions at sqrt(s) = 7 TeV
• Electroweak top-quark pair production at the LHC with $Z^{\prime }$ bosons to NLO QCD in POWHEG
• Kinematics of Top Quark Final States: A Snowmass White Paper