Abstract
The Q 2 dependence of diffractive ρ meson electroproduction has been analyzed in the present paper. This dependence arises from the virtual photon–vector meson–reggeon vertex that is represented by a triangle of a quark loop. Integration over the quark loop produces a form involving a Spence function that is symmetric in the external masses connected to the triangle. In the Regge model, the vertex is considered a residue of the Regge pole. As the parameterization of the Regge residue is given by an exponential function of t times the residue at t=0 then, the vertex is reduced to an elementary function. Two pomeron models have also been adopted in the analysis. A reasonable agreement with the data has been achieved.
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Hamad, K.M.A. Q 2 dependence of diffractive ρ meson electroproduction. Eur. Phys. J. C 72, 1927 (2012). https://doi.org/10.1140/epjc/s10052-012-1927-z
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DOI: https://doi.org/10.1140/epjc/s10052-012-1927-z