Inclusive top-pair production phenomenology with TOPIXS

Abstract

We discuss various aspects of inclusive top-quark pair production based on TOPIXS, a new, flexible program that computes the production cross section at the Tevatron and LHC at next-to-next-to-leading logarithmic accuracy in soft and Coulomb resummation, including bound-state effects and the complete next-to-next-to-leading order result in the q-qbar channel, which has recently become available. We present the calculation of the top-pair cross section in pp collisions at 8 TeV centre-of-mass energy, as well as the cross sections for hypothetical heavy quarks in extensions of the standard model. The dependence on the parton distribution input is studied. Further we investigate the impact of LHC top cross section measurements at sqrt(s)=7 TeV on global fits of the gluon distribution using the NNPDF re-weighting method.

27 pages, 5 figures; v2: corrected typos in Eqs. (2.8) and (6.2) and the text, added footnote on page 4, matches published version

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• The impact of the LHC Z-boson transverse momentum data on PDF determinations
• NNLL soft and Coulomb resummation for squark and gluino production at the LHC
• Spin Correlations in $t\bar{t}$ Production and Decay at the LHC in QCD Perturbation Theory
• NNLL threshold resummation for the total top-pair production cross section
• Reweighting simulated events using machine-learning techniques in the CMS experiment
• Non-relativistic high-energy physics: top production and dark matter annihilation
• Tailored PDFs for New Physics searches
• Measurements of the top-quark mass in fixed schemes and with alternative methods using the ATLAS and CMS detectors at the LHC