Measurements of the ${\gamma }_{v}p\to p^{\prime }{\pi }^{+}{\pi }^{-}$ cross section with the CLAS detector for $0.4$ GeV${}^2$ $<Q^2<$ $1.0$ GeV${}^2$ and $1.3$ GeV $<W<$ $1.825$ GeV

Abstract

New results on the single-differential and fully-integrated cross sections for the process ${\gamma }_{v}p\to p^{\prime }{\pi }^{+}{\pi }^{-}$ are presented. The experimental data were collected with the CLAS detector at Jefferson Laboratory. Measurements were carried out in the kinematic region of the reaction invariant mass $W$ from 1.3 to 1.825 GeV and the photon virtuality $Q^2$ from 0.4 to 1.0 GeV${}^2$. The cross sections were obtained in narrow $Q^2$ bins (0.05 GeV${}^2$) with the smallest statistical uncertainties achieved in double-pion electroproduction experiments to date. The results were found to be in agreement with previously available data where they overlap. A preliminary interpretation of the extracted cross sections, which was based on a phenomenological meson-baryon reaction model, revealed substantial relative contributions from nucleon resonances. The data offer promising prospects to improve knowledge on the $Q^2$-evolution of the electrocouplings of most resonances with masses up to $\sim$1.8 GeV.

22 pages, 22 figures, will be sent to Phys. Rev. C

References in corpus (9)

• Big-Bang Nucleosynthesis
• A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$
• New Results from the Studies of the $N(1440)1/2^{+}$, $N(1520)3/2^{-}$, and $\Delta (1620)1/2^{-}$ Resonances in Exclusive $ep\to e^{\prime }{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction with the CLAS Detector
• Model Analysis of the $ep\to e{p}^{\prime }{\pi }^{+}{\pi }^{-}$ Electroproduction Reaction on the Proton
• Measurements of $ep\to e^{\prime }{\pi }^{+}n$ at W = 1.6 - 2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS
• Measurements of $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$ Cross Sections with CLAS at $1.40<W<2.0$ GeV and $2.0<Q^2<5.0$ GeV${}^2$
• Recent results on the nucleon resonance spectrum and structure from the CLAS detector
• Spectrum and Structure of Excited Baryons with CLAS
• TWOPEG: An Event Generator for Charged Double Pion Electroproduction off Proton

Cited by in corpus (9)

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• Strong QCD Insights from Excited Nucleon Structure Studies with CLAS and CLAS12
• Evidence for the $N^{\prime }(1720)3/2^{+}$ Nucleon Resonance from Combined Studies of CLAS ${\pi }^{+}{\pi }^{-}p$ Photo- and Electroproduction Data
• Nucleon resonance contributions to unpolarised inclusive electron scattering
• Spectrum and structure of octet and decuplet baryons and their positive-parity excitations
• Lepton-Nucleus Cross Section Measurements for DUNE with the LDMX Detector
• Exclusive ${\mathbf{\pi }}^0\mathbf{p}$ electroproduction off protons in the resonance region at photon virtualities 0.4~GeV${}^2$ $\le {\mathbf{Q}}^2\le 1$~GeV${}^2$
• Theory of two-pion photo- and electroproduction off the nucleon
• Evaluation of the inclusive electron scattering observables in the resonance region from the experimental data