Resolved photon and multi-component model for $γ^*$p and $γ^* γ^*$ scattering at high energies

Details Resolved photon and multi-component model for $γ^*$p and $γ^* γ^*$ scattering at high energies Resolved photon and multi-component model for $γ^*$p and $γ^* γ^*$ scattering at high energies

2005-04-15

arxiv.org/abs/hep-ph/0504128v1

Eur.Phys.J.C44:103-110,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 10 figures

Scientific paper

10.1140/epjc/s2005-02351-5

We generalize our previous model for $\gamma^* p$ scattering to $\gamma \gamma$ scattering. In the latter case the number of components naturally grows. When using the model parameters from our previous $\gamma^* p$ analysis the model cross section for $\gamma \gamma$ scattering is larger than the corresponding LEP2 experimental data by more than a factor of two. However, performing a new simultaneous fit to $\gamma^* p$ and $\gamma \gamma$ total cross section we can find an optimal set of parameters to describe both processes. We propose new measures of factorization breaking for $\gamma^* \gamma^*$ collisions and present results for our new model.

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