Multiplicity of photohadronization and photon--hadron scaling violation

Details Multiplicity of photohadronization and photon--hadron scaling violation Multiplicity of photohadronization and photon--hadron scaling violation

2008-02-07

arxiv.org/abs/0802.0956v2

J.Phys.G36:025009,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 3 figures; v2: reference corrected

Scientific paper

10.1088/0954-3899/36/2/025009

The method of scaling transformations permitting to carry out the reconstruction of cross sections of $\gamma N$ and $\gamma\gamma$ interactions on the basis of cross sections of nucleon-(anti)nucleon interactions is suggested. The photon--hadron scaling violation is a consequence of dependence of scaling transformation parameter $\bar n(s)$ on the energy. The universal function $\bar n(s)$ is interpreted as the multiplicity of photohadronization. This function is established by processing the data on $\gamma p$ cross sections in the low energy region $\sqrt{s}< 20 \GeV$ and is extrapolated to the high energy region up to $\sqrt{s}\sim 200 \GeV$. The results of the reconstruction of $\gamma N$ cross sections at high energies and of $\gamma\gamma$ ones at all energies are in a remarkable agreement with available experimental data.

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