Measurements of $e p \to e' π^+ π^- p'$ Cross Sections with CLAS at $1.40 < W < 2.0$ GeV and $2.0 < Q^2 < 5.0$ GeV$^2$

E. L. Isupov; V. D. Burkert; D. S. Carman; R. W. Gothe; K. Hicks; B. S. Ishkhanov; V. I. Mokeev; the CLAS Collaboration

doi:10.1103/physrevc.96.025209

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arXiv · 1705.01901

Measurements of $e p \to e' π^+ π^- p'$ Cross Sections with CLAS at $1.40 < W < 2.0$ GeV and $2.0 < Q^2 < 5.0$ GeV$^2$

E. L. Isupov·V. D. Burkert·D. S. Carman·R. W. Gothe·K. Hicks·B. S. Ishkhanov·V. I. Mokeev·the CLAS Collaboration

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Abstract

This paper reports new exclusive cross sections for $e p \to e' π^+ π^- p'$ using the CLAS detector at Jefferson Laboratory. These results are presented for the first time at photon virtualities 2.0 GeV^2 < Q^2 < 5.0 GeV^2 in the center-of-mass energy range 1.4 GeV < W < 2.0 GeV, which covers a large part of the nucleon resonance region. Using a model developed for the phenomenological analysis of electroproduction data, we see strong indications that the relative contributions from the resonant cross sections at W < 1.74 GeV increase with $Q^2$. These data considerably extend the kinematic reach of previous measurements. Exclusive $e p \to e' π^+ π^- p'$ cross section measurements are of particular importance for the extraction of resonance electrocouplings in the mass range above 1.6 GeV.

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BibTeX RIS

E. L. Isupov, V. D. Burkert, D. S. Carman, R. W. Gothe, K. Hicks, B. S. Ishkhanov, V. I. Mokeev, the CLAS Collaboration. 2017-05-23. Measurements of $e p \to e' π^+ π^- p'$ Cross Sections with CLAS at $1.40 < W < 2.0$ GeV and $2.0 < Q^2 < 5.0$ GeV$^2$. https://doi.org/10.1103/physrevc.96.025209

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