Jet cross sections at high-energy colliders exhibit intricate patterns of logarithmically enhanced higher-order corrections. In particular, so-called non-global logarithms emerge from soft radiation emitted off energetic partons inside jets. While this is a single-logarithmic effect at lepton colliders, at hadron colliders phase factors in the amplitudes lead to double-logarithmic corrections starting at four-loop order.
In my talk I'll first explain the resummation of non-global logarithms at lepton colliders, where techniques for the resummation of sub-leading logarithms are now available. I'll then explain the origin of the "super-leading" double logarithms at hadron colliders and discuss their resummation.
Thomas Becher (Bern): Sub-Leading and Super-Leading Logarithms in Jet Processes
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