Deep exclusive electroproduction of ${\pi }^{+}$ at HERMES

Abstract

Deeply virtual electroproduction of pion in exclusive reaction $p(e,e^{\prime }{\pi }^{+})n$ is studied using a two-component model which includes soft hadronic and hard partonic reaction mechanisms. The results are compared with the experimental data measured at HERMES in the deep inelastic region for values of $Q^2>1$ GeV${}^2$ and $W^2>10$ GeV${}^2$. At forward angles the ${\pi }^{+}$ cross section is longitudinal and is dominated by exchange of Regge poles, with $\pi$ the dominant trajectory. The off-forward region with $-t>1$ GeV${}^2$ is transverse and shows the dominance of partonic subprocesses. An implication of present results for the future JLAB facilities are briefly discussed.

10 pages, 4 figures

References in corpus (5)

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