Heavy Quarks at Threshold: Recent Developments

Details Heavy Quarks at Threshold: Recent Developments Heavy Quarks at Threshold: Recent Developments

2004-09-02

arxiv.org/abs/hep-ph/0409016v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages,talk given at the LCWS Paris, France, April 2004

Scientific paper

Recent developments in the treatment of a system of heavy quarks close to their production threshold are discussed. Particular emphasis is put on the next-to-next-to-next-to-leading order (N$^3$LO) corrections to the energy levels and the wave function and their effect on the cross section $\sigma(e^+e^-\to t\bar{t})$. Furthermore, the resummation of logarithmic corrections within the framework of potential non-relativistic QCD (pNRQCD) are considered.

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