The Evolution of Soft Collinear Effective Theory
arXiv:1410.4216 · doi:10.1142/S2010194515600459
Abstract
Soft Collinear Effective Theory (SCET) is an effective field theory of Quantum Chromodynamics (QCD) for processes where there are energetic, nearly lightlike degrees of freedom interacting with one another via soft radiation. SCET has found many applications in high-energy and nuclear physics, especially in recent years the physics of hadronic jets in , lepton-hadron, hadron-hadron, and heavy-ion collisions. SCET can be used to factorize multi-scale cross sections in these processes into single-scale hard, collinear, and soft functions, and to evolve these through the renormalization group to resum large logarithms of ratios of the scales that appear in the QCD perturbative expansion, as well as to study properties of nonperturbative effects. We overview the elementary concepts of SCET and describe how they can be applied in high-energy and nuclear physics.
arXiv comment12 pages, to appear in the Proceedings of the QCD Evolution Workshop 2014, Santa Fe, NM, May 12-16, 2014, uses ws-ijmpcs.cls. v2: References added
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