Theoretical description of the photon structure function F γ 2 in the low Q 2 region and the total cross section for γ γ interaction at high energies
نویسنده
چکیده
The parametrisation of the real photon structure function F γ 2 in the low Q 2, low x region is formulated. It includes the VMD contribution and the QCD improved parton model component suitably extrapolated to the low Q2 region. We study the sensitivity of our predictions on the extrapolation of the QCD improved parton model part. The parametrisation describes reasonably well existing experimental data on F γ 2 , σγγ for real photons and the low Q 2 data on σγ∗γ . Predictions for σγγ and for σγ∗γ for energies which may become accesssible in future linear colliders are also given.
منابع مشابه
CEA, DAPNIA, Service de Physique des Particules,
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تاریخ انتشار 2000