MASS SHELL SMEARING EFFECTS IN TOP PAIR PRODUCTION

Higgs effects in top quark pair production †

Top quark production in pp̄ and e+e− collisions is enhanced by the exchange of a Higgs boson. The enhancement factors are calculated in the threshold region using the Greens function method. The complete postscript file of this preprint, including figures, is also available via anonymous ftp as /ttp95-25/ttp95-25.ps at ttpux2.physik.uni-karlsruhe.de (129.13.102.139), or via www at http://ttpux2....

Single Top and Top Pair Production

Loop-induced Susy Effects in Strong Top Pair Production

We present some results of the calculation of MSSM one-loop contributions to strong tt̄ production in hadronic collisions. Here we concentrate on the MSSM electroweak-like O(α) and SQCD O(αs) corrections to the main production mechanism at the Fermilab Tevatron pp̄ collider, qq̄ → g → tt̄. We give results for the total tt̄ production rate and for parity violating asymmetries in the production of lef...

Higgs boson pair production at the LHC: top-quark mass effects at next-to-leading order

Higgs boson pair production is considered at next-to-leading order with special emphasis on the effect of a finite top quark mass. It is shown that, unlike for single-Higgs boson production, power-suppressed corrections are numerically important.

Top Quark Pair Production close to Threshold: Top Mass, Width and Momentum Distribution

The complete NNLO QCD corrections to the total cross section σ(ee → Z∗, γ∗ → tt̄) in the kinematic region close to the top-antitop threshold are calculated by solving the corresponding Schrödinger equations exactly in momentum space in a consistent momentum cutoff regularization scheme. The corrections coming from the same NNLO QCD effects to the top quark three-momentum distribution dσ/d|~kt| a...