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arXiv · hep-ph/0310233

Generalized VDM and F_2 data at low Q^2

Johan Alwall·Gunnar Ingelman
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Abstract

The generalised vector meson dominance model (GVDM) gives a good description of F_2 data at very low Q^2. At intermediate Q^2 a GVDM component avoids problems when applying the large-Q^2 DIS formalism, such as a negative gluon distribution in the proton. The fluctuations of the exchanged photon into vector mesons is also a natural part of a model with hadronic fluctuations of the target proton, which gives a good description of the non-perturbative x-shape of the proton's parton density functions at the starting scale Q^2_0 for DGLAP evolution.

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Johan Alwall, Gunnar Ingelman. 2003-10-20. Generalized VDM and F_2 data at low Q^2. https://arxiv.org/abs/hep-ph/0310233

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