Brief Review of Saturation Physics

Abstract

We present a short overview of saturation physics followed by a summary of the recent progress in our understanding of nonlinear small-$x$ evolution. Topics include McLerran-Venugopalan model, Glauber-Mueller approximation, nonlinear BK/JIMWLK evolution equations, along with the running-coupling and NLO corrections to these equations. We conclude with selected topics in saturation phenomenology.

17 pages, 11 figures; based on the lectures presented at the LIV Cracow School of Theoretical Physics "QCD meets experiment" in Zakopane, Poland in June 2014 and on the overview talk given at the "QCD Evolution Workshop" in Santa Fe, NM in May 2014

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• Observations on staggered fermions at non-zero lattice spacing
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• Precision study of the SU(3) topological susceptibility in the continuum
• Staggered versus overlap fermions: a study in the Schwinger model with $N_f=0,1,2$
• Renormalization-group analysis of the validity of staggered-fermion QCD with the fourth-root recipe
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