  The next-to-leading order weak-coupling shear viscosity of QCD was computed 6
years ago.
  However, these results have never been applied at finite baryon chemical
potential $\mu$, even though intermediate-energy heavy ion collisions and
merging neutron stars may explore the Quark-Gluon Plasma in a regime where
baryon chemical potentials are large.
  Here, we extend the next-to-leading order shear viscosity calculations to
finite $\mu$, and we show that, while the convergence of the weak-coupling
expansion is questionable for achievable plasmas, it is somewhat better at $\mu
> T$ than at $\mu=0$.
