Super-leading logarithms in non-global observables in QCD?

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    We reconsider the calculation of a non-global QCD observable and find the possible breakdown of QCD coherence. This breakdown arises as a result of wide angle soft gluon emission developing a sensitivity to emission at small angles and it leads to the appearance of super-leading logarithms. We use the 'gaps between jets' cross-section as a concrete example and illustrate that the new logarithms are intimately connected with the presence of Coulomb gluon contributions. We present some rough estimates of their potential phenomenological significance. © SISSA 2006.
    Original languageEnglish
    Article number059
    JournalThe Journal of High Energy Physics
    Issue number8
    Publication statusPublished - 1 Aug 2006


    • Hadronic Colliders
    • Jets
    • QCD


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