The frozen QCD coupling is a parameter often used as an effective fixed
coupling. It is supposed to mimic both the running coupling effects and the
lack of knowledge of alpha_s in the infrared region. Usually the value of the
frozen coupling is fixed from the analysis of the experimental data. We present
a novel way to define such coupling(s) independently of the experiments. We
argue that there are different frozen couplings which are used in the double-
(DL) and single- logarithmic (SL) Approximations. We introduce four kinds of
the frozen couplings: the coupling used in DLA with a time-like argument (i.e.
the coupling present in the non-singlet scattering amplitudes and DIS structure
functions) which we find 0.24 approximately; the DLA coupling with a space-like
argument (in e+e- -annihilation, in DY processes and in any scattering
amplitude in the hard or backward kinematics) which is a factor two larger,
namely 0.48. We also show that the frozen coupling in the SL evolution
equations like BFKL has to be defined in a way less accurate compared to DLA,
and our estimate for this coupling is 0.1. Our estimates for the singlet and
non-singlet intercepts are also in a good agreement with the results available
in the literature.Comment: 11 pages, 3 figure
