Understand
We present a program to calculate the total cross section for top-quark pair production in hadronic collisions.
- The program takes into account recent theoretical developments such as approximate next-to-next-to-leading order perturbative QCD corrections and it allows for studies of the theoretical uncertainty by separate variations of the factorization and renormalization scales.
- In addition it offers the possibility to obtain the cross section as a function of the running top-quark mass.
- The program can also be applied to a hypothetical fourth quark family provided the QCD couplings are standard.
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