76 citations · 249 across the 13 of their papers we have counts for
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Exploring arbitrarily high orders of optimized perturbation theory in QCD with nf -> 16.5
P. M. Stevenson
Perturbative QCD with nf flavours of massless quarks becomes simple in the hypothetical limit nf -> 16.5, where the leading beta-function coefficient vanishes. The Banks-Zaks (BZ)…
The effective exponent gamma(Q) and the slope of the beta function
P. M. Stevenson
The slope of the beta function at a fixed point is commonly thought to be RG invariant and to be the critical exponent gamma* that governs the approach of any physical quantity R t…
Fixed and Unfixed Points: Infrared limits in optimized QCD perturbation theory
P. M. Stevenson
Perturbative QCD, when optimized by the principle of minimal sensitivity at fourth order, yields finite results for R(e+e-)(Q) down to Q=0. For two massless flavours (n_f=2) this o…
Optimization of QCD Perturbation Theory: Results for R(e+e-) at fourth order
P. M. Stevenson
Physical quantities in QCD are independent of renormalization scheme (RS), but that exact invariance is spoiled by truncations of the perturbation series. "Optimization" correspond…
Are There Pressure Waves in the Vacuum?
P. M. Stevenson
The Higgs vacuum is a kind of medium. In any medium one generally expects sound waves for sufficiently long wavelengths (>> mean free path). I briefly describe how the broken-symme…
Physical mechanisms generating spontaneous symmetry breaking and a hierarchy of scales
M. Consoli, P. M. Stevenson
We discuss the phase transition in 3+1 dimensional lambda Phi^4 theory from a very physical perspective. The particles of the symmetric phase (`phions') interact via a hard-core re…