The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 5 Issue 3 (1998) pp 461-470
DOI 10.1007/s100529800978

theoretical physics:
Dynamical parton distributions revisited

M. Glück (1), E. Reya (1), A. Vogt (2)

(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

Abstract. 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, $10^{-8} \lesssim x \lesssim 10^{-5}$, relevant to questions concerning ultra-high-energy cosmic ray and neutrino astronomy.

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Online publication: September 24, 1998
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