Dynamical parton distributions revisited
M. Glück1 - E. Reya1 - A. Vogt2
1 Institut für Physik, Universität Dortmund,
D-44221 Dortmund, Germany
2 Institut für Theoretische Physik, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
Received: 22 June 1998 / Published online: 21 August 1998
Dynamical parton densities, generated radiatively from valence-like inputs at some low resolution scale, are confronted with recent small-x data on deep inelastic and other hard scattering processes. It is shown that within theoretical uncertainties our previous (1994) dynamical/radiative parton distributions are compatible with most recent data and still applicable within the restricted accuracy margins of the presently available next-to-leading order calculations. Due to recent high precision measurements we also present an updated, more accurate, version of our (valence-like) dynamical input distributions. Furthermore, our perturbatively stable parameter-free dynamical predictions are extended to the extremely small-x region, 10-8 x 10-5, relevant to questions concerning ultra-high-energy cosmic ray and neutrino astronomy.