alphas: compute alpha strong at given scale

In hadron: Analysis Framework for Monte Carlo Simulation Data in Physics

compute alpha strong at given scale

Description

compute alpha strong (alpha_s) at given scale mu up to N3LO in PT in the RI' renormalisation scheme.

Usage

alphas(mu, nl = 3, lam0 = 0.25, Nc = 3, Nf = 2, use.cimpl = TRUE)

Arguments

mu	the renormalisation scale mu in GeV
nl	order in PT, range 0 to 3
lam0	Lambda_QCD in GeV
Nc	number of colours Nc, defaults to 3
Nf	number of flavours Nf, default is 2
use.cimpl	Use the C implementation instead of the R implementation, which might improve speed.

Value

returns the value of alpha strong alpha_s at scale mu

Author(s)

Carsten Urbach, [e-mail], Vittorio Lubicz (of the original Fortran code)

See Also

zetazp

Examples

alphas(mu=2.0, nl=3)

hadron documentation built on Sept. 9, 2022, 5:06 p.m.