set_alphas_rcl

set_alphas_rcl(as, Q, Nf)

Sets the values of \(\alpha_\mathrm{s}\) to as, the renormalization scale \(\mu_\mathrm{MS}\) to Q and the number of active quark flavours to Nf. The choosen value of as should correspond to the physical value of \(\alpha_\mathrm{s}\) at the scale Q computed in the Nf-flavour scheme. For Nf=-1 the quarks with mass less than Q are active flavours.

Parameters:
  • s (float) – value of alpha_s
  • Q (float) – renormalization scale
  • Nf (int) – number of light quarks