How fast do small x structure function rise ? A comparative analysis

Details How fast do small x structure function rise ? A comparative analysis How fast do small x structure function rise ? A comparative analysis

1999-03-18

arxiv.org/abs/hep-ph/9903397v3

Phys.Lett. B459 (1999) 265-270

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages (LaTeX), including 4 figures (eps), condensed revised version

Scientific paper

10.1016/S0370-2693(99)00650-4

We parametrize the small x, singlet component of the proton structure function F_2 by powers and logarithms of 1/x for discrete values of Q^2 between 0.2 and 2000 GeV^2, and compare these parametrizations by applying the criterion of minimal $\chi^2$. The obtained values of the fitted parameters may be used to study the evolution of F_2 in Q^2 and/or in discriminating between dynamical models. A slowing-down in the increase of F_2 towards highest available values of Q^2 is revealed. The effect is quantified in terms of the derivative ${\frac{d\ell n F_2(x,Q^2)}{{d\ell n (1/x)}}}$.

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