Gluon- vs. Sea quark-Shadowing

Details Gluon- vs. Sea quark-Shadowing Gluon- vs. Sea quark-Shadowing

1998-11-04

arxiv.org/abs/hep-ph/9811242v1

Phys.Lett. B448 (1999) 290-294

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 eps figures

Scientific paper

10.1016/S0370-2693(99)00059-3

We calculate the shadowing of sea quarks and gluons and show that the shadowing of gluons is {\it not} simply given by the sea quark shadowing, especially at small $x$. The calculations are done in the lab frame approach by using the generalized vector meson dominance model. Here the virtual photon turns into a hadronic fluctuation long before the nucleus. The subsequent coherent interaction with more than one nucleon in the nucleus leads to the depletion $\sigma (\gamma^* A) < A\sigma (\gamma^* N)$ known as shadowing. A comparison of the shadowing of quarks to E665 data for $^{40}Ca$ and $^{207}Pb$ shows good agreement.

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