F_2^gamma at low Q^2 and sigma_{γγ} at high energies

Details F_2^gamma at low Q^2 and sigma_{γγ} at high energies F_2^gamma at low Q^2 and sigma_{γγ} at high energies

1999-03-03

arxiv.org/abs/hep-ph/9903248v1

Acta Phys.Polon.B30:1807-1815,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX with 4 eps figures

Scientific paper

The parametrisation of the photon structure function in the low Q^2 region is formulated. It includes the VMD contribution and the QCD improved parton model component suitably extrapolated to the low Q^2 region. The parametrisation describes reasonably well existing experimental data on sigma_{\gamma \gamma} for real photons and the low Q^2 data on sigma_{\gamma^* \gamma}. Predictions for sigma_{\gamma \gamma} and for sigma_{\gamma^* \gamma} for energies which may be accesssible in future linear colliders are also given.

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