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Abstract: A description of exclusive charged pion electroproduction $e,e-\pi^{\pm}$off nucleons at high energies is proposed. The model combines a Regge poleapproach with residual effect of nucleon resonances. The exchanges of$\pi$140, vector $ ho770$ and axial-vector $a 11260$ and $b 11235$Regge trajectories are considered. The contribution of nucleon resonances isdescribed using a dual connection between the exclusive hadronic form factorsand inclusive deep inelastic structure functions. The model describes themeasured longitudinal, transverse and interference cross sections at JLAB andDESY. The scaling behavior of the cross sections is in agreement with JLAB anddeeply virtual HERMES data. The results for a polarized beam-spin azimuthalasymmetry in $\vec{e},e-\pi^{\pm}$ are presented. Model predictions for JLABat 12 GeV are given.



Autor: Murat M. Kaskulov, Ulrich Mosel Giessen U.

Fuente: https://arxiv.org/



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