Speaker
Ingo Schienbein
(LPSC Grenoble/Univ Grenoble Alpes)
Description
We present predictions for the electroweak production of top-quark pairs at the LHC in the presence of a new neutral gauge boson based on a new calculation which includes the NLO QCD corrections implemented in the parton shower program POWHEG.
The interference effects of Standard Model and New Physics contributions are properly taken into account and the QED singularities, first appearing at this order, are consistently subtracted. We show numerical results for SM and Z' total cross sections and various distributions. The remaining theoretical uncertainty from scale and PDF variations is estimated and we compare results obtained using the PYTHIA 8 and HERWIG 6 parton shower Monte Carlos. The potential of the charge asymmetry
to distinguish between new physics models is investigated for the Sequential SM and a leptophobic topcolor model.
Primary author
Ingo Schienbein
(LPSC Grenoble/Univ Grenoble Alpes)
Co-authors
Dr.
Florian Lyonnet
(Southern Methodist University Dallas)
Prof.
Michael Klasen
(WWU Muenster)
Dr.
Roberto Bonciani
(Universita di Roma, La Sapienza)
Dr.
Tomas Jezo
(Universita di Milano-Bicocca and INFN, Sezione die Milano-Bicocca)
