Interpretation of electron proton scattering at low Q**2

Alwall, Johan; Ingelman, Gunnar

doi:10.1016/j.physletb.2004.06.076

Interpretation of electron proton scattering at low Q**2

Johan Alwall
(
- Uppsala U.
)
,
Gunnar Ingelman
(
- Uppsala U. and
- DESY
)

Feb, 2004

9 pages

Published in:

Phys.Lett.B 596 (2004) 77-83

e-Print:

hep-ph/0402248 [hep-ph]

DOI:

10.1016/j.physletb.2004.06.076

Report number:

TSL-ISV-2004-0277

View in:

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Abstract:

Low-Q^2 photons do not resolve partons in the proton, which gives problems when applying the deep inelastic scattering formalism, such as an unphysical, negative gluon density extracted from data. Considering instead hadronic fluctuations of the photon, we show that the generalised vector meson dominance model (GVDM) gives a good description of the measured cross section at low Q^2, i.e. reproduces F_2(x,Q^2), using only few parameters with essentially known values. Combining GVDM and parton density functions makes it possible to obtain a good description of F_2 data over the whole range of x and Q^2.

13.60.Hb
13.60.-r
12.40.Vv
Proton
structure
functions
Parton
density
Generalised
vector

References(33)

Figures(0)

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