Parametrization of $F_2^\gamma$ at low $Q^2$ and of $\sigma_{\gamma \gamma}$ and $\sigma_{\gamma^* \gamma}$ at high-energies
| Autor: | Badelek, Barbara Maria, Krawczyk, M., Kwiecinski, J., Stasto, A. M. |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
two-photon [exchange]
vector dominance dispersion relation on-shell [photon] electron positron: inelastic scattering model: parton interaction [photon photon] photon photon: interaction numerical calculations: interpretation of experiments interpretation of experiments [numerical calculations] quantum chromodynamics interaction [photon electron] photon: structure function ddc:530 off-shell [photon] photon: on-shell total cross section: energy dependence exchange: two-photon energy dependence [total cross section] inelastic scattering [electron positron] parametrization parton [model] photon: off-shell structure function [photon] photon electron: interaction |
| DOI: | 10.3204/PUBDB-2023-04151 |
| Popis: | 8 pp. (2000). A parametrization of the real photon structure function $F_2^\gamma$ in the low $Q^2$, low $x$ region is formulated. It includes both the vector meson dominance (VMD) and the QCD components, the latter suitably extrapolated to the low $Q^2$ region and based on arbitrary parton distributions in the photon. The parametrization used together with the Gluck, Reya, and Vogt (GRV) and Gluck, Reya, and Schienbein (GRS) parton densities describes reasonably well the existing high energy data on $F_2^\gamma$, $\sigma_{\gamma\gamma}$, and the low $Q^2$ data on $\sigma_{\gamma^* \gamma}$. Predictions for $\sigma_{\gamma\gamma}$ and for $\sigma_{\gamma^*\gamma}$ for energies which may become accessible in future linear colliders are also given. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|