zetazp: Computes the running of Z_P from scale mu0 to scale mu2

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

Computes the running of Z_P from scale mu0 to scale mu2

Description

Computes the running of the renomalisation constant Z_P from scale mu0 to scale mu2 in the renomalisation schema RI' for Nf=2 only. The running is done using perturbation theory up to alpha_s^3 order. The corresponding values of alpha_s at the scales mu0 and mu2 are needed as input, see alphas.

Usage

zetazp(zp0, alpha0, alpha2, nl = 3)

Arguments

zp0	initial value of Z_P
alpha0	alpha_s at initial scale
alpha2	alpha_s at final scale
nl	order in PT, range 0 to 3

Value

returns the value of Z_P at scale mu2 in the RI' scheme

Author(s)

Carsten Urbach, [e-mail]

See Also

alphas

Examples

al2 <- alphas(mu = 3.0, nl = 3, lam0 = 0.250, Nc = 3, Nf = 2)
al0 <- alphas(mu = 2.0, nl = 3, lam0 = 0.250, Nc = 3, Nf = 2)
zetazp(zp0 = 0.6, alpha0 = al0, alpha2 = al2, nl = 3)

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