The Components of the $\gamma^*\gamma^*$ Cross Section

E. Gotsman; E. Levin; U. Maor; E. Naftali

doi:10.1007/s100520000362

The Components of the $\gamma^\gamma^$ Cross Section

High Energy Physics - Phenomenology 2011-09-13 v1

Authors: E. Gotsman , E. Levin , U. Maor , E. Naftali

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Abstract

We extend our previous treatment of $\gamma^*p$ cross section based on Gribov's hypothesis to the case of photon-photon scattering. With the aid of two parameters, determined from experimental data, we separate the interactions into two categories corresponding to short ("soft") and long ("hard") distance processes. The photon-photon cross section, thus, receives contributions from three sectors, soft-soft, hard-hard and hard-soft. The additive quark model is used to describe the soft-soft sector, pQCD the hard-hard sector, while the hard-soft sector is determined by relating it to the $\gamma^{*}$ p system. We calculate and display the behaviour of the total photon-photon cross section and it's various components and polarizations for different values of energy and virtuality of the two photons, and discuss the significance of our results.

Keywords

photon-photon scattering cross section soft interactions hard interactions additive quark model pQCD

Cite

@article{arxiv.hep-ph/0001080,
  title  = {The Components of the $\gamma^*\gamma^*$ Cross Section},
  author = {E. Gotsman and E. Levin and U. Maor and E. Naftali},
  journal= {arXiv preprint arXiv:hep-ph/0001080},
  year   = {2011}
}

Comments

28 pages, 12 Postscript figures