%0 Journal Article
%A Brodsky, S. J.
%A Merino, C.
%A Peláez Sagredo, José Ramón
%T Measuring the QCD Gell-Mann–Low ψ function
%D 1999
%@ 0556-2821
%U https://hdl.handle.net/20.500.14352/59878
%X We present a general method for extracting the Gell-Mann-Low logarithmic derivative of an effective charge of an observable directly from data as a mean for empirically verifying the universal terms of the QCD beta function. Our method avoids the biases implicit in fitting to QCD-motivated forms as well as the interpolation errors introduced by constructing derivatives from discrete data. We also derive relations between moments of effective charges as new tests of perturbative QCD. [S0556-2821(99)00221-0].
%~