Two-loop soft anomalous dimensions with massive and massless quarks

Abstract

I present results for two-loop soft anomalous dimensions, which are derived from dimensionally regularized diagrams with eikonal quark lines and control soft-gluon emission in hard-scattering processes. Detailed results for the UV poles of the eikonal integrals are shown for massive quarks, and the massless limit is also taken. The construction of soft anomalous dimensions at two-loops allows soft-gluon resummations at NNLL accuracy.

8 pages, 6 figures; to be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726

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Cited by in corpus (7)

• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production
• NNLL resummation for s-channel single top quark production
• Next-to-next-to-leading soft-gluon corrections for the top quark cross section and transverse momentum distribution
• HQET heavy-heavy vertex diagram with two velocities
• Introduction to effective field theories. 3. Bloch--Nordsieck effective theory, HQET
• Two-loop resummation for QCD hard scattering