Abstract :
Precise determinations of the strong coupling constant in hadronic collisions demand sets of parton densities spanning a sufficiently wide range of values for the QCD scale parameter Λ. For such applications, we supplement the recent GRV parametrization by five sets of dynamically generated parton distributions for Λ-values corresponding to αS(MZ2) between 0.104 and 0.122. Present DIS data, including recent small-x HERA results, do not appreciably discriminate between these sets.
