Nuclear Shadowing and the Proton Structure Function at Small x

Details Nuclear Shadowing and the Proton Structure Function at Small x Nuclear Shadowing and the Proton Structure Function at Small x

1995-04-24

arxiv.org/abs/hep-ph/9504380v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LATEX, 3 uuencoded figures

Scientific paper

A new scaling variable is introduced in terms of which nuclear shadowing in deep-inelastic scattering is universal, i.e. independent of $A$, $Q^2$ and $x$. This variable can be interpreted as a measure of the number of gluons probed by the hadronic fluctuations of a virtual photon during their lifetime. According to recent data from the H1 and ZEUS experiments, the gluon density in a proton rises steeply as $x$ tends to zero. So nuclei which in the infinite momentum frame have a large surface density of gluons model at larger $x$ values what we expect for the proton at much smaller $x$. Using experimental information on nuclear shadowing we predict the unitarity corrections to the proton structure function at small $x$ and extract the bare Pomeron intercept.

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